{
  "schema": "canli.company-reference.v1",
  "cik": "0001117733",
  "name": "CAFEPRESS INC.",
  "selection_policy": "extended-v23",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001117733.json",
  "source_sha256": "9c54055bf974d7a50582c23ae915eba755a920b0178c2dcdbe91f6fb2ed513d5",
  "fetched_at": "2026-09-22T19:40:50.502Z",
  "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": "2017-12-31",
          "val": 51172000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 62920000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 91383000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 122485000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 109195000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 141201000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 157532000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 88982000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-12-31",
          "val": 15241000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 18452000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 21060000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 52300000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 39194000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 58531000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 64223000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 40551000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-12-31",
          "val": 35931000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 44468000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-05-31",
          "val": 66000000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "unit": "USD"
        },
        {
          "end": "2016-03-31",
          "val": 67500000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2016Q1I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 70323000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 70185000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 70001000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 82670000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 92737000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 25354000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 17419000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 7709000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2009Q4I",
          "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": "2017-12-31",
          "val": 24924000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 19980000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 32663000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 26971000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 33335000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 31198000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 27900000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 19276000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 13255000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2009Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -10257000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -26470000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2155000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -15907000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -13913000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -388000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 3606000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2723000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -6426000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -1846000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -1883000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1032000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 9717000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 10110000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 16924000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 13553000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 2138000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 4089000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 3346000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2665000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 6279000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 8039000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 3440000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 4389000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 85685000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 102208000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 107125000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 132054000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 146195000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 155999000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 175482000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 127930000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -392000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -1581000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -4277000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -1563000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -3574000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 40483000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -273000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 400000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 13275000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -12673000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 8174000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -2155000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -4006000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -47295000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -8027000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -7932000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-12-31",
          "val": -65764000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": -55290000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": -28820000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": -30975000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": -30508000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": -15068000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": -583000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 501000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 16771000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 16709000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 17239000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 17308000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 17143000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 15021000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 8798000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 8308000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfDilutedSharesOutstanding",
      "taxonomy": "us-gaap",
      "label": "Diluted weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Weighted-average shares used for diluted earnings per share. Potential shares are included under the applicable dilution rules, not simply added to outstanding shares.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 16771000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 16709000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 17296000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 17308000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 17318000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 15416000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 9403000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 8860000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareBasic",
      "taxonomy": "us-gaap",
      "label": "Basic earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per basic common share or unit. Inspect attribution, share classes and restatements before comparing periods. This is not a market return.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -0.61,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -1.58,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 0.13,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -0.92,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -0.81,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -0.03,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 0.17,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 0.11,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareDiluted",
      "taxonomy": "us-gaap",
      "label": "Diluted earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per share under dilution rules. Antidilutive instruments may be excluded. A diluted value can equal the basic value without implying no potential dilution.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -0.61,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -1.58,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 0.13,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -0.92,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -0.81,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -0.03,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 0.16,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 0.1,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "IncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Current and deferred income tax expense or benefit for continuing operations. This accounting expense differs from cash taxes paid.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 4000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -390000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 128000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -1700000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 6973000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -385000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1701000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1724000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-12-31",
          "val": 10679000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 10936000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 8624000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 11659000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 21964000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 19892000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 13303000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 1769000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1607000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1706000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2801000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 2875000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 4183000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2378000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2174000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -10504000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -27384000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -6195000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -16580000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -8511000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -1152000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 5445000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 4307000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-12-31",
          "val": 38748000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 51303000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 61252000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 90050000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 38238000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 63957000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 72150000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 52533000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InterestExpense",
      "taxonomy": "us-gaap",
      "label": "Interest expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Borrowing costs recognized as interest expense. This is distinct from cash interest paid and may not include every capitalized borrowing cost.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 11000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 66000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 62000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 77000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 113000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 169000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 194000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 215000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-12-31",
          "val": 14936000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 18286000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 20360000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 50851000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 35573000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 53864000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 58313000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 34560000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccountsPayableCurrent",
      "taxonomy": "us-gaap",
      "label": "Current accounts payable",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current amounts owed to suppliers for goods and services received. This is one component of current liabilities, not all accrued obligations.",
      "observations": [
        {
          "end": "2017-12-31",
          "val": 2351000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1803000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3938000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 8015000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 10581000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 24081000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 15088000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 10512000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2016-12-31",
          "val": 0,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 20899000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 20535000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 39448000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 39448000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 11076000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 6796000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 3119000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2009Q4I",
          "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": "2014-12-31",
          "val": 5758000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 15003000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 19979000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 6756000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccountsReceivableNetCurrent",
      "taxonomy": "us-gaap",
      "label": "Net current accounts receivable",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current customer receivables after the allowance for credit loss. The balance is not cash collected or a guarantee of collection.",
      "observations": [
        {
          "end": "2017-12-31",
          "val": 1496000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1288000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 680000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1029000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 8303000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 10390000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2210000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 58000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1021000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 4184000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 0,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 0,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 43686000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 69186000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 50251000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 63618000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 62244000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 60972000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 69846000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 51176000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-12-31",
          "val": 3128000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 3119000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3850000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 6750000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 9493000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 9765000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 6726000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 33182000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 41802000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 44056000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 47038000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 53733000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 59820000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 75291000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 55483000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 52503000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 60406000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 63069000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 85016000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 92462000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 96179000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 100191000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 72447000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 12062000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 12825000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 12490000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 13448000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 13461000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 12870000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "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": "2017-12-31",
          "val": 16932000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "shares"
        },
        {
          "end": "2016-12-31",
          "val": 16643000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "shares"
        },
        {
          "end": "2015-12-31",
          "val": 16766000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "shares"
        },
        {
          "end": "2014-12-31",
          "val": 17417000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "shares"
        },
        {
          "end": "2013-12-31",
          "val": 17173000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "shares"
        },
        {
          "end": "2012-12-31",
          "val": 17114000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "shares"
        },
        {
          "end": "2011-12-31",
          "val": 8943000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-12-31",
          "val": 26437000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 19980000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 36080000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "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": "2017-12-31",
          "val": 45467000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 41892000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 48706000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 56360000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 63014000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 53733000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 41791000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "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": "2017-12-31",
          "val": 34788000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 30956000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 40082000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 44701000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 41050000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 33841000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 28488000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "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": "2017-12-31",
          "val": 232000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 681000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 608000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 241000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 829000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 863000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 3199000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-12-31",
          "val": 305000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 166000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 353000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 539000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2633000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 3628000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 3289000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccruedLiabilitiesCurrent",
      "taxonomy": "us-gaap",
      "label": "Accrued current liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current obligations accrued for goods and services received but not yet invoiced or paid. This is one component of current liabilities, not all short-term obligations.",
      "observations": [
        {
          "end": "2017-12-31",
          "val": 8693000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 11765000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 10701000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 12007000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 12059000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 17761000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 8713000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2017-12-31",
          "val": 2412000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 2310000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2413000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 4517000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 6630000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 4844000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2631000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2011Q4I",
          "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": "2013-12-31",
          "val": -869000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 7211000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2115000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -10253000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -26860000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -6135000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -16633000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -8591000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -1245000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 5307000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 4447000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetIncomeLossAvailableToCommonStockholdersBasic",
      "taxonomy": "us-gaap",
      "label": "Net income available to common stockholders",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net income after preferred dividends and similar adjustments, the numerator for basic earnings per share. It can be lower than reported net income.",
      "observations": [
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -13501000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -82000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1456000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 894000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 10110000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 10192000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 12560000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 18590000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 12668000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 13537000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 13573000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 9593000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 4700000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 4300000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 6300000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 7300000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 7200000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 6294000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 5836000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 6364000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2016-01-01",
          "end": "2016-12-31",
          "val": 0,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1229000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 4239000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 4976000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 3647000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2385000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 911000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -88000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -52000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 40000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -992000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -2069000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1466000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2673000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2284000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 92000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -338000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 88000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -708000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 9042000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -1851000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -972000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -560000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 0,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -13000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -1094000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -2571000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 997000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 2517000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2384000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2960000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncreaseDecreaseInAccountsReceivable",
      "taxonomy": "us-gaap",
      "label": "Change in accounts receivable",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The cash flow adjustment for the change in receivables during the period. A positive value under this concept means receivables grew and reduced operating cash flow.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 138000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 608000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -349000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 346000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -2080000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 6057000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -1319000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2254000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 9000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -731000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -2900000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -107000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -272000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 2136000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 2079000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 922000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncreaseDecreaseInAccountsPayable",
      "taxonomy": "us-gaap",
      "label": "Change in accounts payable",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The cash flow adjustment for the change in payables during the period. A positive value under this concept means payables grew and added to operating cash flow.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 548000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -2105000,
          "accn": "0001117733-18-000023",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-28",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -4100000,
          "accn": "0001117733-17-000018",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-10",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -7071000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 8181000,
          "accn": "0001117733-16-000012",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-30",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 3710000,
          "accn": "0001193125-15-114440",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-31",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 371000,
          "accn": "0001193125-14-124061",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-31",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 3492000,
          "accn": "0001193125-13-112850",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-18",
          "frame": "CY2010",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/9c54055bf974d7a50582c23ae915eba755a920b0178c2dcdbe91f6fb2ed513d5.json.gz"
}
