{
  "schema": "canli.company-reference.v1",
  "cik": "0000892482",
  "name": "Qumu Corporation",
  "selection_policy": "extended-v23",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0000892482.json",
  "source_sha256": "f3e027330168e92ddc047e4b76b9d0a0e1c9e937c905a85e059531350dafc3cc",
  "fetched_at": "2026-09-22T19:33:07.282Z",
  "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": "2021-12-31",
          "val": 37096000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 31426000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 31716000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 30280000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 34276000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 42229000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 54412000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 80177000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 89146000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 95563000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 157660000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 148044000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Liabilities",
      "taxonomy": "us-gaap",
      "label": "Total liabilities",
      "kind": "instant",
      "meaning": "Recognized obligations at the reporting date. The definition and scope differ from interest-bearing debt.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 24500000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 28541000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 21508000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 23275000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 25084000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 23653000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 23655000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 21904000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 26565000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 24936000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 25360000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 19407000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2013-12-31",
          "val": 62581000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 70524000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 131940000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 128131000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2010Q4I",
          "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": "2021-12-31",
          "val": 20563000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 11878000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 10639000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 8636000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 7690000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 10364000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 7072000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 11684000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 37725000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 28644000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 70161000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 107982000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 72507000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 14885000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": -16365000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -9200000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -6443000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -3617000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -11724000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -11175000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -28699000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -8520000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -9694000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -48338000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2835000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 7700000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 8495000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": -17408000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 1570000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -1538000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -2843000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -2012000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -9484000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -23227000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -22644000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 2367000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -1925000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 7064000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 11641000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 14162000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 239000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 128000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 168000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 127000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 24000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 76000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 635000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1051000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 662000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1872000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1177000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 4178000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 424000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Revenues",
      "taxonomy": "us-gaap",
      "label": "Revenue",
      "kind": "duration",
      "meaning": "Revenue under this specific accounting concept. A missing value is not zero; filers can use other revenue concepts.",
      "observations": [
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 25013000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 28167000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 31682000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 34454000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 26521000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 17736000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 9836000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 83634000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 88731000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 83227000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 24022000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 29072000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 25362000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 25013000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 28167000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 31682000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 26276000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -120000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 3602000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -5743000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -747000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 6956000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -228000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 35000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -129000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -14998000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -10351000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -255000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1254000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": -189000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -128000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -127000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 9651000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -24000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 6174000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 18923000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -3180000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 6926000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -24513000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -34471000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 24087000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 42163000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-12-31",
          "val": -90693000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": -74328000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": -65128000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-01-01",
          "val": -58685000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": -58875000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-01-01",
          "val": -55258000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": -56197000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": -44473000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": -33298000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": -4599000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 3921000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 13615000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 76875000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 84657000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 17514000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 13612000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 10395000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 9499000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 9347000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 9232000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 9235000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 8836000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 8691000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 9971000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 9674000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 9524000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 9374000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 17650000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 13627000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 10414000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 9606000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 9347000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 9232000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 9235000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 8836000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 8691000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 9971000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 9699000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 9596000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 9507000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": -0.93,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -0.68,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -0.62,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -0.38,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -1.25,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -1.21,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -3.11,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -0.96,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -1.12,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -4.85,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 0.29,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 0.81,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 0.91,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": -1.01,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -0.7,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -0.63,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -0.39,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -1.25,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -1.23,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -3.11,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -0.96,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -1.12,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -4.85,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 0.29,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 0.8,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 0.89,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": -392000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -306000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -194000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 298000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -358000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -252000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -839000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -6564000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -3396000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 4435000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1997000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 4494000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 4617000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-12-31",
          "val": 337000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 249000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 596000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-01-01",
          "val": 669000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 545000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 911000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1827000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2942000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1899000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1379000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 5966000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 6177000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 7528000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 2067000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 1178000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 857000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 1082000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 1190000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1421000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1834000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1841000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1435000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1704000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1980000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1937000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1542000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": -18295000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -7304000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -5310000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -6913000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -8871000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -11361000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -29404000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -28726000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -19605000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -49428000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 4448000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 11572000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 11246000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-12-31",
          "val": 27458000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 20738000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 18633000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 17918000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 15205000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 20646000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 28629000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 52752000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 71774000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 75950000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 98437000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 136532000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2010Q4I",
          "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": "2021-12-31",
          "val": 22229000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 23656000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 17804000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 17053000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 16672000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 15431000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 19113000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 19377000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 23028000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 19807000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 20156000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 16303000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-12-31",
          "val": 7388000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 7455000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 7203000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 6971000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 7390000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 6749000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 8103000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 8525000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 0,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 22218000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 22218000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "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": "2017-12-31",
          "val": 6295000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 8110000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 11032000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 13384000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 8578000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsForRepurchaseOfCommonStock",
      "taxonomy": "us-gaap",
      "label": "Common-stock repurchase payments",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash paid to reacquire common stock during the period. This is not an authorization limit or a direct measure of the net change in share count.",
      "observations": [
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 0,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 0,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 9758000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 6028000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1826000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingExpenses",
      "taxonomy": "us-gaap",
      "label": "Operating expenses",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Recurring operating costs under this accounting concept, generally excluding production costs included in cost of sales. Check filing presentation before combining expense subtotals.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 36149000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 28023000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 23613000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 23433000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 26776000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 30683000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 46359000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 40775000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 30007000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 55345000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 37573000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 31938000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 29087000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-12-31",
          "val": 164000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 184000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 350000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 191000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 227000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 204000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 250000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 168000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 120000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 6036000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 6198000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 4502000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "GrossProfit",
      "taxonomy": "us-gaap",
      "label": "Gross profit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Revenue less the costs directly attributed to the goods or services sold. It precedes other operating expenses and is not net income.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 17854000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 20719000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 18303000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 16520000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 17905000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 19322000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 16955000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 12049000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 10402000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 5917000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 42021000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 43510000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 40333000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CostOfRevenue",
      "taxonomy": "us-gaap",
      "label": "Cost of revenue",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Costs attributed to goods produced and sold and services provided during the period. This is not the sum of every operating expense.",
      "observations": [
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 8493000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 10262000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 12360000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 17499000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 14472000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 7334000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 3919000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 41613000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 45221000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 42894000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2014-01-01",
          "end": "2014-12-31",
          "val": 30617000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 20635000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 17144000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 30093000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 25432000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 21944000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 8426000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 8252000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 7360000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 7013000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 7279000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 8541000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 10689000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 9506000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 8745000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 7701000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 7257000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 6506000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 7143000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-12-31",
          "val": 17786959,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "shares"
        },
        {
          "end": "2020-12-31",
          "val": 13780823,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "shares"
        },
        {
          "end": "2019-12-31",
          "val": 13553409,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "shares"
        },
        {
          "end": "2018-12-31",
          "val": 9624060,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "shares"
        },
        {
          "end": "2017-12-31",
          "val": 9364804,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "shares"
        },
        {
          "end": "2016-12-31",
          "val": 9227247,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "shares"
        },
        {
          "end": "2015-12-31",
          "val": 9188682,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "shares"
        },
        {
          "end": "2014-12-31",
          "val": 9127425,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "shares"
        },
        {
          "end": "2013-12-31",
          "val": 8674029,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "shares"
        },
        {
          "end": "2012-12-31",
          "val": 8653932,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "shares"
        },
        {
          "end": "2011-12-31",
          "val": 10203734,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "shares"
        },
        {
          "end": "2010-12-31",
          "val": 9479272,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-12-31",
          "val": 20563000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 11878000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 10639000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 8636000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 7690000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2017Q4I",
          "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": "2021-12-31",
          "val": -2544000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": -2414000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": -2861000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": -3288000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-01-01",
          "val": -2745000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": -2740000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": -3907000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": -1521000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": -785000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 162000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 116000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 128000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 317000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
      "taxonomy": "us-gaap",
      "label": "Total equity including noncontrolling interests",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Equity including the portion attributable to noncontrolling interests. It is larger than or equal to parent stockholders equity and is not market capitalization.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 12596000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 2885000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 10208000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 7005000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 9192000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 18576000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 30757000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 58273000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 62581000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 70627000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 132300000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 128637000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 119949000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 109048000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2008Q4I",
          "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": "2021-12-31",
          "val": 146000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 332000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1746000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-01-01",
          "val": 1367000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 0,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "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": "2021-12-31",
          "val": 618000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1289000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 2174000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2019Q4I",
          "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": "2017-12-31",
          "val": 7605000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 6617000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 0,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "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": "2021-12-31",
          "val": 1881000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1625000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 3116000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 3354000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 5589000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 5538000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 5557000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 3741000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2597000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 20365000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 18398000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "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": "2021-12-31",
          "val": 1544000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1376000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 2520000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 2809000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 4678000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 3711000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2615000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1842000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1218000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 14399000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 12221000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "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": "2021-12-31",
          "val": 1388000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 2143000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 3075000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 4247000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 6295000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 8110000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 11032000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 13384000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 8225000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 9964000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 19238000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "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": "2021-12-31",
          "val": 362000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 490000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 442000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 544000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-01-01",
          "val": 4388000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 4398000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 4827000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3649000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 3615000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 3288000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 3077000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 3001000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 1475000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-12-31",
          "val": 0,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 160000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 0,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 195000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 0,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 0,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 226000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 0,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 519000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 660000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 339000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 664000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": "2021-12-31",
          "val": 2184000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 2302000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1981000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 2192000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-01-01",
          "val": 1731000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1830000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 2470000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3392000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 3801000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1816000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2628000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 1902000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 1069000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "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": 10862000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 12918000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 10140000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "DeferredTaxAssetsNet",
      "taxonomy": "us-gaap",
      "label": "Net deferred tax assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Deferred tax assets after the valuation allowance. Realization depends on future taxable income, so the balance is not a receivable from tax authorities.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 368000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 437000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 789000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 997000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1245000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 2450000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2948000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2850000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 3089000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 4271000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 18922000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
      "taxonomy": "us-gaap",
      "label": "Pre-tax income or loss from continuing operations",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Income or loss from continuing operations before income taxes and noncontrolling interests. It excludes discontinued operations and is not net income.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -16757000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -9506000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -6637000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -3319000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -12082000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -11427000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -29528000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -28907000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -19617000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -49355000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 4669000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 12096000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 13112000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": -16365000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -9200000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -6443000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -3617000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -11724000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -11175000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -28699000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -8520000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -9819000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -48597000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2672000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 7602000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 8495000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2013-01-01",
          "end": "2013-12-31",
          "val": -9648000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -48352000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2629000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 7224000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "GeneralAndAdministrativeExpense",
      "taxonomy": "us-gaap",
      "label": "General and administrative expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "General and administrative costs reported under this concept, separate from selling expense. Filers group overhead differently, so compare presentation before comparing companies.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 8596000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 10059000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 6787000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 7122000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 8567000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 9722000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 16878000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 12626000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 10332000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 228000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 575000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 314000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 438000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 900000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1200000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1052000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 747000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 600000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 610000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2313000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2018000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 983000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 1518000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1526000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 2366000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 3045000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 3303000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 3118000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2049000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1787000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 2349000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2937000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2108000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1250000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AmortizationOfIntangibleAssets",
      "taxonomy": "us-gaap",
      "label": "Amortization of intangible assets",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Amortization recognized on finite-lived intangible assets. It follows acquisition accounting and does not indicate the intangibles are losing usefulness at that rate.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 755000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 943000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1212000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 1928000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 2101000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 2142000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 798000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 652000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 627000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 952000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 223000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 0,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 2000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -406000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -125000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -378000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -433000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 84000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -131000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -241000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -40000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -8000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 9000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 3000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -2000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 1538000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -2202000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -1327000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 3594000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -3211000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -66000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -124000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -181000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -12000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 73000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 221000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 524000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1866000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CurrentIncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Current income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Income tax expense or benefit for the period that is currently payable or refundable. It differs from cash taxes paid and from total tax expense.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -394000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -307000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -229000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 269000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -351000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -205000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -793000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -183000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -599000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -2431000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 4085000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 4453000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "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": 2000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 1000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 35000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 29000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -7000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -47000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -46000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -6381000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -2797000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 6866000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -2088000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 41000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -573000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 54000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 14000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 546000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 505000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2018",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncomeTaxesPaidNet",
      "taxonomy": "us-gaap",
      "label": "Income taxes paid, net",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash income taxes paid net of refunds during the period. It differs from income tax expense and can reflect prior years and estimated payments.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -338000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -248000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -293000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 52000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -190000,
          "accn": "0000892482-20-000007",
          "fy": 2019,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2020-03-06",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 22000,
          "accn": "0000892482-19-000013",
          "fy": 2018,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -22000,
          "accn": "0000892482-18-000015",
          "fy": 2017,
          "fp": "Q4",
          "form": "10-K",
          "filed": "2018-03-23",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -1145000,
          "accn": "0000892482-17-000024",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-31",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -3243000,
          "accn": "0000892482-16-000029",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-15",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -218000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 5412000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 4346000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 4031000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "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": "2021-01-01",
          "end": "2021-12-31",
          "val": 23085000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 0,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 8201000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 0,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2018",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeasePayments",
      "taxonomy": "us-gaap",
      "label": "Operating lease payments",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash paid for operating lease liabilities during the period. It differs from lease expense recognized and excludes variable payments in some presentations.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 672000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 522000,
          "accn": "0000892482-22-000012",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-04-15",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 432000,
          "accn": "0000892482-21-000008",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-10",
          "frame": "CY2019",
          "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": "2014-01-01",
          "end": "2014-12-31",
          "val": 18000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -110000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 118000,
          "accn": "0000892482-15-000003",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-24",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1545000,
          "accn": "0000892482-14-000003",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-14",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 429000,
          "accn": "0001445305-13-000625",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-15",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -1486000,
          "accn": "0000897101-12-000447",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-15",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/f3e027330168e92ddc047e4b76b9d0a0e1c9e937c905a85e059531350dafc3cc.json.gz"
}
