{
  "schema": "canli.company-reference.v1",
  "cik": "0001082038",
  "name": "DURECT CORP",
  "selection_policy": "extended-v23",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001082038.json",
  "source_sha256": "a17ea00e819127a270a1021b9b2d05f5ccda235a0c3c43963e79db999142a8d4",
  "fetched_at": "2026-09-21T17:17:55.585Z",
  "policy": "Latest-filed annual-report facts per unit and reporting period at capture time. Duration facts cover 300 to 400 days. This selection can include restatements and is not a point-in-time backtest dataset. Missing concepts are omitted, never zero-filled. Values retain original units and are not currency converted. Extended concepts require compatible unit shapes and at least three reporting ends with changing values within one unit. Constant or incompatible added histories are omitted.",
  "claim_boundary": "Public company accounting reference, not market prices, returns, an investment recommendation, or ALPHAC performance. Validate a separately constructed return series with the validation API; accounting values are not returns.",
  "concepts": [
    {
      "tag": "Assets",
      "taxonomy": "us-gaap",
      "label": "Total assets",
      "kind": "instant",
      "meaning": "Resources recognized on the balance sheet. Book assets are not the market value of the business.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 18349000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 45189000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 60100000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 91990000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 75641000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 86020000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 49999000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 53113000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 40508000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 46772000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 50084000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 40820000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 45935000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 49196000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 67560000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "StockholdersEquity",
      "taxonomy": "us-gaap",
      "label": "Stockholders equity",
      "kind": "instant",
      "meaning": "The reported residual interest after liabilities. It is an accounting amount, not market capitalization.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 9131000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 14783000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 24985000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 57782000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 40115000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 22860000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 20000000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 21488000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 8338000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 14883000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 18515000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 30721000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 36331000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 3477000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 14487000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 27843000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 37564000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CashAndCashEquivalentsAtCarryingValue",
      "taxonomy": "us-gaap",
      "label": "Cash and cash equivalents",
      "kind": "instant",
      "meaning": "Cash and qualifying short-term liquid investments under the filer’s accounting policy. Restricted cash and longer-term investments may be reported separately.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 11011000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 28400000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 43483000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 49844000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 21312000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 34924000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 31644000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 29375000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 5404000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3583000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2680000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 7836000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 11195000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 8896000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 10437000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 8287000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 29445000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetIncomeLoss",
      "taxonomy": "us-gaap",
      "label": "Net income or loss",
      "kind": "duration",
      "meaning": "Reported profit or loss for the period. Check the filing for attribution, exceptional items and discontinued operations before comparing companies.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -8324000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -27624000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -35333000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -36265000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -582000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -20578000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -25322000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -3695000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -34509000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -22663000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -22110000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -21452000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 16200000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -18765000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -22898000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -30288000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInOperatingActivities",
      "taxonomy": "us-gaap",
      "label": "Operating cash flow",
      "kind": "duration",
      "meaning": "Cash generated or used by operating activities. Working-capital timing can make this differ substantially from reported income.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -19086000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -34414000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -26280000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -37311000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -38704000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 11101000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -19750000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -1343000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -27293000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -15448000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -13448000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -17386000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 7763000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -20894000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsToAcquirePropertyPlantAndEquipment",
      "taxonomy": "us-gaap",
      "label": "Capital expenditure payments",
      "kind": "duration",
      "meaning": "Cash payments to acquire property, plant and equipment. This taxonomy concept does not capture every form of investment or acquisition.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 0,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 52000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 111000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 194000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 208000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 155000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 93000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 69000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 147000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 225000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 204000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 69000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 290000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2467000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 256000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 294000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RevenueFromContractWithCustomerExcludingAssessedTax",
      "taxonomy": "us-gaap",
      "label": "Contract revenue excluding tax",
      "kind": "duration",
      "meaning": "Revenue from customer contracts excluding assessed taxes under this specific taxonomy concept. It is not automatically comparable to older revenue tags.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 2031000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 2590000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 19283000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 13977000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 30111000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 25074000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 15275000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 49170000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 14025000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInFinancingActivities",
      "taxonomy": "us-gaap",
      "label": "Financing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from financing activities, including borrowing, repayments and transactions with owners. A positive amount does not establish operating profitability.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -16347000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 20497000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 83000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 50532000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 15660000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 19503000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 17482000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 12624000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 23077000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 10981000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 11840000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1111000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 517000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 10119000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInInvestingActivities",
      "taxonomy": "us-gaap",
      "label": "Investing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from investing activities, including asset purchases, disposals and investment transactions. This differs from capital expenditure payments alone.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 18044000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -1166000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 19836000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 15311000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 9432000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -27324000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 4537000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 12690000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 6037000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1108000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 3907000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 14734000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -6130000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -10383000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RetainedEarningsAccumulatedDeficit",
      "taxonomy": "us-gaap",
      "label": "Retained earnings or deficit",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Accumulated undistributed earnings or deficit at the reporting date. This balance is not cash available for distribution.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": -597330000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": -589006000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": -561382000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": -526049000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": -489784000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": -489202000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": -468624000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": -443772000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": -440077000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": -405568000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": -382905000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": -360795000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": -339343000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": -355543000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": -336778000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfSharesOutstandingBasic",
      "taxonomy": "us-gaap",
      "label": "Basic weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Time-weighted shares used for basic earnings per share. This denominator differs from shares outstanding at a single reporting date.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 30940000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 26256000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 22777000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 22505000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 19946000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 178042000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 159834000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 145273000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 133163000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 118523000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 111666000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 103078000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 88433000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 87410000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 86868000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfDilutedSharesOutstanding",
      "taxonomy": "us-gaap",
      "label": "Diluted weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Weighted-average shares used for diluted earnings per share. Potential shares are included under the applicable dilution rules, not simply added to outstanding shares.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 30940000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 26520000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 22777000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 22505000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 19946000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 178042000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 159834000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 145273000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 133163000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 118523000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 111666000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 103078000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 88589000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 87410000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 86868000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareBasic",
      "taxonomy": "us-gaap",
      "label": "Basic earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per basic common share or unit. Inspect attribution, share classes and restatements before comparing periods. This is not a market return.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -0.27,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD/shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -1.05,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -1.55,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -1.61,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -0.03,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -0.12,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -0.16,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -0.03,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -0.26,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -0.19,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -0.2,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -0.21,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 0.18,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -0.21,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -0.26,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareDiluted",
      "taxonomy": "us-gaap",
      "label": "Diluted earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per share under dilution rules. Antidilutive instruments may be excluded. A diluted value can equal the basic value without implying no potential dilution.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -0.27,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD/shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -1.2,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -1.55,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -1.61,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -0.03,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -0.12,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -0.16,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -0.03,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -0.26,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -0.19,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -0.2,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -0.21,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 0.18,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -0.21,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -0.26,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "IncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Current and deferred income tax expense or benefit for continuing operations. This accounting expense differs from cash taxes paid.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 0,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 0,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 0,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 0,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -150000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 0,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 53000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 24000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 320000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 0,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 0,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PropertyPlantAndEquipmentNet",
      "taxonomy": "us-gaap",
      "label": "Net property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Carrying amount of property, plant and equipment after accumulated depreciation, depletion and amortization. It is not replacement cost or market value.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 41000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 88000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 188000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 227000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 251000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 159000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 605000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 929000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1297000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1566000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1749000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1985000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2457000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 3124000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 1776000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ShareBasedCompensation",
      "taxonomy": "us-gaap",
      "label": "Share-based compensation expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Reported noncash expense for share-based payment arrangements. Noncash treatment does not mean the awards have no economic cost to shareholders.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 1995000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 2538000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 2457000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 2688000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 2170000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 2108000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 2998000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 2605000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 2655000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2660000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 3080000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 3426000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 4320000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 6641000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 7802000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 11430000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingIncomeLoss",
      "taxonomy": "us-gaap",
      "label": "Operating income or loss",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Operating revenue less operating expenses for the reporting period. It excludes items outside the reported operating result and is not free cash flow.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -18912000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -39682000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -35082000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -34273000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -12615000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -19944000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -23640000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -2237000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -32364000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -20664000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -20998000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -21162000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 16056000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -18853000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -23835000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -30672000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AssetsCurrent",
      "taxonomy": "us-gaap",
      "label": "Current assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Assets classified as current under the normal operating cycle or one-year boundary. Not all current assets can be converted immediately into cash.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 13175000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 34672000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 51394000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 81737000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 63061000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 71829000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 41740000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 45358000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 32426000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 38321000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 39494000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 28328000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 36355000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 37301000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 54845000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InterestExpense",
      "taxonomy": "us-gaap",
      "label": "Interest expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Borrowing costs recognized as interest expense. This is distinct from cash interest paid and may not include every capitalized borrowing cost.",
      "observations": [
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 2399000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 2148000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 2237000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 2501000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 2573000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 2425000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 2288000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2236000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1151000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 6000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 7000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 5000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "LiabilitiesCurrent",
      "taxonomy": "us-gaap",
      "label": "Current liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Obligations classified as current under the operating-cycle or one-year boundary. The balance includes more than short-term borrowing.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 7710000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 27011000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 34004000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 10056000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 10703000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 36768000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 7662000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 15828000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 28750000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 7447000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 6968000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 7185000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 6927000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 14891000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 17909000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccountsPayableCurrent",
      "taxonomy": "us-gaap",
      "label": "Current accounts payable",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current amounts owed to suppliers for goods and services received. This is one component of current liabilities, not all accrued obligations.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 309000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 1723000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 3106000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 1311000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1678000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1982000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 1589000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1520000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 2086000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1286000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1021000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 736000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 1785000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 1274000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 981000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Goodwill",
      "taxonomy": "us-gaap",
      "label": "Goodwill carrying amount",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Recognized goodwill remaining after accumulated impairment. It arises from business combinations and does not measure the current value of the company’s brand.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 2725000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 6169000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 6169000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 6169000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 6169000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 6399000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 6400000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 6399000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 6399000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 6399000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 6399000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 6399000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 6399000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 6399000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 6399000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "FiniteLivedIntangibleAssetsNet",
      "taxonomy": "us-gaap",
      "label": "Net finite-lived intangible assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Finite-lived intangible assets after amortization. This excludes goodwill and should not be combined with indefinite-lived intangible assets without checking scope.",
      "observations": [
        {
          "end": "2013-12-31",
          "val": 18000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 36000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 53000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccountsReceivableNetCurrent",
      "taxonomy": "us-gaap",
      "label": "Net current accounts receivable",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current customer receivables after the allowance for credit loss. The balance is not cash collected or a guarantee of collection.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 453000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 618000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 3423000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 6477000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 940000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1516000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 1757000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 2376000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1154000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2222000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2122000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2349000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2166000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 3448000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 3716000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InventoryNet",
      "taxonomy": "us-gaap",
      "label": "Net inventory",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Inventory carrying amount after applicable valuation and LIFO reserves. It does not establish realizable selling proceeds or inventory turnover without other inputs.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 106000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 132000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 2113000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 1870000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1864000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1919000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 3421000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 3163000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 3782000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3917000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 3642000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 3502000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 3399000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 3252000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2836000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "SellingGeneralAndAdministrativeExpense",
      "taxonomy": "us-gaap",
      "label": "Selling, general and administrative expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Selling and general administrative costs reported under this concept. It is an expense category, not a substitute for total operating expenses.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 10482000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 12653000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 15915000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 14449000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 13611000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 14115000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 12262000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 13165000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 11825000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 11566000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 12284000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 12706000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 12095000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 13574000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 14937000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 15020000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ResearchAndDevelopmentExpense",
      "taxonomy": "us-gaap",
      "label": "Research and development expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Research and development costs recognized as expense. Capitalization policies and acquired projects can make this differ from total cash invested in development.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 10383000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 29351000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 36862000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 31846000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 27709000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 29640000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 25013000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 31609000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 29274000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 24317000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 22429000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 18945000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 20265000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 34053000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 36214000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 34801000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CommonStockSharesOutstanding",
      "taxonomy": "us-gaap",
      "label": "Common shares outstanding",
      "kind": "instant",
      "unitKind": "shares",
      "meaning": "Common shares outstanding at the reporting date. This point-in-time count differs from the weighted-average shares used for earnings per share and can exclude other share classes.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 31042000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024Q4I",
          "unit": "shares"
        },
        {
          "end": "2023-12-31",
          "val": 30334000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "shares"
        },
        {
          "end": "2022-12-31",
          "val": 22785000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "shares"
        },
        {
          "end": "2021-12-31",
          "val": 22768000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "shares"
        },
        {
          "end": "2020-12-31",
          "val": 203533000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "shares"
        },
        {
          "end": "2019-12-31",
          "val": 195257000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "shares"
        },
        {
          "end": "2018-12-31",
          "val": 162060000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "shares"
        },
        {
          "end": "2017-12-31",
          "val": 150837000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "shares"
        },
        {
          "end": "2016-12-31",
          "val": 141297000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "shares"
        },
        {
          "end": "2015-12-31",
          "val": 121839000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "shares"
        },
        {
          "end": "2014-12-31",
          "val": 113733000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "shares"
        },
        {
          "end": "2013-12-31",
          "val": 110409000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "shares"
        },
        {
          "end": "2012-12-31",
          "val": 101880000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "shares"
        },
        {
          "end": "2011-12-31",
          "val": 87547,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "shares"
        },
        {
          "end": "2010-12-31",
          "val": 87053000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
      "taxonomy": "us-gaap",
      "label": "Cash including restricted cash",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cash, cash equivalents and restricted cash as reported in the cash flow reconciliation. Restricted amounts are not freely available, so this is not the same as unrestricted cash.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 11161000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 28550000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 43633000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 49994000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 21462000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 35074000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 31794000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 29525000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 5554000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3733000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2015Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
      "taxonomy": "us-gaap",
      "label": "Accumulated other comprehensive income or loss",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cumulative other comprehensive items after tax, such as translation and unrealized hedging or securities effects. These amounts have not passed through net income.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": -1000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": -14000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": -13000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": -10000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": -5000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": -3000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": -1000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": -3000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": -14000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 87000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 6000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 5000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 6000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeaseRightOfUseAsset",
      "taxonomy": "us-gaap",
      "label": "Operating lease right-of-use asset",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Carrying amount of the right to use leased assets under operating leases. It reflects discounted remaining payments, not the value of the underlying property.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 2135000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 3079000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 1943000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 3446000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 4749000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 5866000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-01-01",
          "val": 7300000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeaseLiability",
      "taxonomy": "us-gaap",
      "label": "Operating lease liability",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Present value of remaining operating lease payments. Discount-rate choices and lease terms affect the amount; it is not the sum of undiscounted future rent.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 2206000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 4083000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 2092000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 3672000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-01-01",
          "val": 7700000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 362000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "LongTermDebt",
      "taxonomy": "us-gaap",
      "label": "Long-term debt",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Long-term borrowings under this concept, which can include the current portion depending on presentation. It is not total liabilities and may exclude leases and other obligations.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 16663000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 21170000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 20632000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 20820000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 20262000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 20533000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 19915000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 19684000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 19824000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2014Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PropertyPlantAndEquipmentGross",
      "taxonomy": "us-gaap",
      "label": "Gross property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cost of property, plant and equipment before accumulated depreciation. Historical cost does not indicate current value or replacement cost.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 14030000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 14109000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 19281000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 19170000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 19360000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 19236000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 22646000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 22736000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 22673000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 22537000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 22356000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 22473000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 22413000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 22830000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment",
      "taxonomy": "us-gaap",
      "label": "Accumulated depreciation on property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cumulative depreciation, depletion and amortization recorded against property, plant and equipment. It measures cost allocation to date, not physical wear or market value.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 13989000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 14021000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 19093000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 18943000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 19109000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 19077000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 22041000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 21807000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 21376000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 20971000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 20607000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 20488000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 19956000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 19706000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IntangibleAssetsNetExcludingGoodwill",
      "taxonomy": "us-gaap",
      "label": "Net intangible assets excluding goodwill",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Intangible assets other than goodwill after amortization and impairment. Internally developed intangibles are usually not recognized, so this understates what a company relies on.",
      "observations": [
        {
          "end": "2015-12-31",
          "val": 0,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 0,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 18000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 36000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 53000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 71000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OtherAssetsNoncurrent",
      "taxonomy": "us-gaap",
      "label": "Other noncurrent assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Noncurrent assets the filer does not present separately. The composition differs by filer and is described only in the filing.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 123000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 123000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 256000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 261000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 261000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1085000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 1105000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 277000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 236000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 236000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 288000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 288000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 288000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 288000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 405000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OtherLiabilitiesNoncurrent",
      "taxonomy": "us-gaap",
      "label": "Other noncurrent liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Noncurrent liabilities the filer does not present separately. The composition differs by filer and is described only in the filing.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 384000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 594000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 851000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 884000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 873000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 705000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 992000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1126000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1541000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2489000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2035000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1618000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 1197000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 738000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 315000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccruedLiabilitiesCurrent",
      "taxonomy": "us-gaap",
      "label": "Accrued current liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current obligations accrued for goods and services received but not yet invoiced or paid. This is one component of current liabilities, not all short-term obligations.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 4771000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 5810000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 7896000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 6799000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 6346000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 5940000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 4668000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 5511000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 5060000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 4970000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 5051000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 5865000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 3997000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 4884000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 6740000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PrepaidExpenseAndOtherAssetsCurrent",
      "taxonomy": "us-gaap",
      "label": "Prepaid expenses and other current assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Prepayments and other current assets grouped under this concept. The balance is not cash and its composition differs by filer.",
      "observations": [
        {
          "end": "2024-12-31",
          "val": 813000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 1465000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 2375000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 3580000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 4545000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1424000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 2247000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 3060000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 2486000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3142000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1034000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1888000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2258000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 1803000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2785000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ContractWithCustomerLiabilityCurrent",
      "taxonomy": "us-gaap",
      "label": "Current contract liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Consideration received before performance obligations are satisfied, often called deferred revenue. It is an obligation to deliver, not earned revenue or cash available.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 98000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-01-01",
          "val": 22679000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 22679000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 682000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ProfitLoss",
      "taxonomy": "us-gaap",
      "label": "Profit or loss including noncontrolling interests",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net income or loss including the portion attributable to noncontrolling interests. It can differ from the net income attributable to the parent that per-share figures use.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -8324000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -27624000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -35333000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -36265000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -582000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -20578000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -25322000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -3695000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -34509000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ComprehensiveIncomeNetOfTax",
      "taxonomy": "us-gaap",
      "label": "Comprehensive income or loss",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net income plus other comprehensive income after tax. It includes unrealized items that net income excludes and is not a cash measure.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -8311000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -27625000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -35336000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -36270000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -584000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -20581000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -25321000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -3693000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -34498000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -22764000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -22024000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -21457000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 16201000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -18766000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -22902000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -30359000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Depreciation",
      "taxonomy": "us-gaap",
      "label": "Depreciation expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Depreciation recognized for the period under this concept. It is a noncash allocation of asset cost and may exclude amortization and depletion reported elsewhere.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 49000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 148000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 150000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 132000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 297000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 291000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 254000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 437000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 416000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 425000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 582000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 541000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 948000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1200000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2200000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "DepreciationDepletionAndAmortization",
      "taxonomy": "us-gaap",
      "label": "Depreciation, depletion and amortization",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Combined depreciation, depletion and amortization for the period. A noncash allocation of asset cost, not a measure of maintenance spending.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 84000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 31000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 119000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 288000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 297000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 291000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 254000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 437000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 416000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 425000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 601000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 558000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 964000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1176000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2251000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 2506000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OtherNonoperatingIncomeExpense",
      "taxonomy": "us-gaap",
      "label": "Other nonoperating income or expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Other income or expense outside operations under this concept. The composition is filer-specific and can include one-time items.",
      "observations": [
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 237000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 39000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -284000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 151000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NonoperatingIncomeExpense",
      "taxonomy": "us-gaap",
      "label": "Nonoperating income or expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Total nonoperating income or expense, which can include interest, investment results and other items. A positive value is not operating profit.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 498000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 12052000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -251000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -1992000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -1720000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -1427000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -1703000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -1458000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -2145000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -1999000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -1112000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -290000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 144000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 88000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 937000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 384000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "DeferredIncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Deferred income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The deferred portion of income tax expense or benefit, arising from timing differences. It is not tax paid in the period.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 0,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 0,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 0,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 0,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -153000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 0,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -8000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 320000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 320000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InterestPaidNet",
      "taxonomy": "us-gaap",
      "label": "Interest paid, net",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash interest paid during the period, net of amounts capitalized where the filer reports it that way. It differs from interest expense recognized.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 1407000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 2332000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 1800000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 1617000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 1678000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1942000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 1886000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 1703000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1611000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ProceedsFromIssuanceOfCommonStock",
      "taxonomy": "us-gaap",
      "label": "Proceeds from issuing common stock",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash received from issuing common stock during the period. It is gross of costs only where the filer reports it so, and it does not include noncash issuances.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 648000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 1564000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 25000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 47660000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 12283000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 18360000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 16780000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 11989000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 23745000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 14290000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 4618000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 10675000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-12-01",
          "end": "2013-11-30",
          "val": 10600000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 11617000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1126000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 565000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 528000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncreaseDecreaseInAccountsReceivable",
      "taxonomy": "us-gaap",
      "label": "Change in accounts receivable",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The cash flow adjustment for the change in receivables during the period. A positive value under this concept means receivables grew and reduced operating cash flow.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -371000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -2162000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -3054000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 5440000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -389000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 556000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -619000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 1222000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -1068000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 100000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -227000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 183000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -1282000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -268000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2016000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -2355000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncreaseDecreaseInInventories",
      "taxonomy": "us-gaap",
      "label": "Change in inventories",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The cash flow adjustment for the change in inventories during the period. A positive value under this concept means inventory grew and reduced operating cash flow.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 214000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 107000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 245000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 4000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 249000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 217000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 549000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 140000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 552000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 579000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1369000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 681000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 353000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 670000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 303000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -190000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncreaseDecreaseInAccountsPayable",
      "taxonomy": "us-gaap",
      "label": "Change in accounts payable",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The cash flow adjustment for the change in payables during the period. A positive value under this concept means payables grew and added to operating cash flow.",
      "observations": [
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -1380000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -1329000,
          "accn": "0000950170-25-046209",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-27",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 1795000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -367000,
          "accn": "0000950170-24-038141",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-28",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -241000,
          "accn": "0000950170-23-006743",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 520000,
          "accn": "0001564590-22-009097",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-08",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 69000,
          "accn": "0001564590-21-011240",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -566000,
          "accn": "0001564590-20-008923",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-05",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 800000,
          "accn": "0001564590-19-007004",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 265000,
          "accn": "0001564590-18-004889",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-08",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 285000,
          "accn": "0001564590-17-004451",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-15",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -1049000,
          "accn": "0001193125-16-488358",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-01",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 511000,
          "accn": "0001193125-15-074853",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-03",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 293000,
          "accn": "0001193125-14-076949",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-28",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -38000,
          "accn": "0001193125-13-087839",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-01",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1000,
          "accn": "0001193125-12-094391",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/a17ea00e819127a270a1021b9b2d05f5ccda235a0c3c43963e79db999142a8d4.json.gz"
}
