{
  "schema": "canli.company-reference.v1",
  "cik": "0001001115",
  "name": "GEOSPACE TECHNOLOGIES CORP",
  "selection_policy": "extended-v22",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001001115.json",
  "source_sha256": "877048aa4427aa52b67d5c7618e30af1c74a1983d35b5866daddd811380671fc",
  "fetched_at": "2026-09-20T05:11:08.589Z",
  "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": "2025-09-30",
          "val": 153037000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 152194000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 153042000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 135056000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 163929000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 186845000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 202008000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 199080000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 205696000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-06-30",
          "val": 221773000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q2I",
          "unit": "USD"
        },
        {
          "end": "2017-03-31",
          "val": 232747000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q1I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 244109000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 254772000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 303592000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 354986000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 327225000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 259022000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 196801000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 163496000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "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": "2025-09-30",
          "val": 27528000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 17570000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 20326000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 13409000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 21472000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 25875000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 23161000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 22493000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 10542000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 10305000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 13968000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 25728000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 38167000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 44035000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 19788000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 26910000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "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": "2025-09-30",
          "val": 125509000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 134624000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 132716000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 121647000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 142457000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 160970000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 178847000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 176587000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 194803000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 244467000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 289624000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 329258000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 289058000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 214987000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-10-01",
          "val": 177013000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 177013000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 136586000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2010Q3I",
          "unit": "USD"
        },
        {
          "end": "2009-09-30",
          "val": 118658000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2009Q3I",
          "unit": "USD"
        },
        {
          "end": "2008-09-30",
          "val": 117363000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2008Q3I",
          "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": "2025-09-30",
          "val": 26338000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 6895000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 18803000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 16109000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 14066000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 32686000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 18925000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 11934000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 15092000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-06-30",
          "val": 17077000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "unit": "USD"
        },
        {
          "end": "2017-03-31",
          "val": 19307000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 12794000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 10262000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 22314000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 33357000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 2726000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 50752000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 31388000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 33453000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2010Q3I",
          "unit": "USD"
        },
        {
          "end": "2009-09-30",
          "val": 8571000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2009Q3I",
          "unit": "USD"
        },
        {
          "end": "2008-09-30",
          "val": 1562000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2008Q3I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetIncomeLoss",
      "taxonomy": "us-gaap",
      "label": "Net income or loss",
      "kind": "duration",
      "meaning": "Reported profit or loss for the period. Check the filing for attribution, exceptional items and discontinued operations before comparing companies.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": -9724000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": -6578000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 12206000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": -22856000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": -14056000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": -19242000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": -146000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": -19212000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": -56791000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": -45970000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": -32641000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 36911000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 69557000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 35118000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 29711000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 14082000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 1760000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInOperatingActivities",
      "taxonomy": "us-gaap",
      "label": "Operating cash flow",
      "kind": "duration",
      "meaning": "Cash generated or used by operating activities. Working-capital timing can make this differ substantially from reported income.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": -22232000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": -9083000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 15558000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": -10035000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": -7172000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 18122000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 5629000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": -10401000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 10091000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": -1695000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": -57161000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 43224000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 1136000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 28778000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 17064000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsToAcquirePropertyPlantAndEquipment",
      "taxonomy": "us-gaap",
      "label": "Capital expenditure payments",
      "kind": "duration",
      "meaning": "Cash payments to acquire property, plant and equipment. This taxonomy concept does not capture every form of investment or acquisition.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 7973000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 3857000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 3964000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 1130000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 3188000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 2916000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 1936000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 1721000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 1177000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 1867000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 2189000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 6792000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 19384000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 4013000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 4730000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 2224000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 390000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Revenues",
      "taxonomy": "us-gaap",
      "label": "Revenue",
      "kind": "duration",
      "meaning": "Revenue under this specific accounting concept. A missing value is not zero; filers can use other revenue concepts.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 110803000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 135598000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 124509000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 89253000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 94864000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 87835000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 95809000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 75748000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 73721000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 62060000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 84867000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 236912000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 300607000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 191664000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RevenueFromContractWithCustomerExcludingAssessedTax",
      "taxonomy": "us-gaap",
      "label": "Contract revenue excluding tax",
      "kind": "duration",
      "meaning": "Revenue from customer contracts excluding assessed taxes under this specific taxonomy concept. It is not automatically comparable to older revenue tags.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 110803000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 135598000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 124509000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 89253000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 75864000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 34136000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 45847000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 53306000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInFinancingActivities",
      "taxonomy": "us-gaap",
      "label": "Financing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from financing activities, including borrowing, repayments and transactions with owners. A positive amount does not establish operating profitability.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": -1013000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": -6385000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": -525000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": -1713000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": -8226000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": -78000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 215000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 63000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 50000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 5740000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 2489000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 1954000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 1330000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": -9734000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInInvestingActivities",
      "taxonomy": "us-gaap",
      "label": "Investing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from investing activities, including asset purchases, disposals and investment transactions. This differs from capital expenditure payments alone.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 42692000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 3824000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": -11882000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 14149000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": -3318000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": -4050000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 1560000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 7777000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": -5458000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": -10208000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 3390000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": -26321000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": -5152000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": -4863000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": -1409000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RetainedEarningsAccumulatedDeficit",
      "taxonomy": "us-gaap",
      "label": "Retained earnings or deficit",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Accumulated undistributed earnings or deficit at the reporting date. This balance is not cash available for distribution.",
      "observations": [
        {
          "end": "2025-09-30",
          "val": 45558000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 55282000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 61860000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 49654000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 72510000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 86566000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 105808000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 105954000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 125517000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 182308000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 228278000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 260919000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 224008000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 154451000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 119333000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 89622000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfSharesOutstandingBasic",
      "taxonomy": "us-gaap",
      "label": "Basic weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Time-weighted shares used for basic earnings per share. This denominator differs from shares outstanding at a single reporting date.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 12793075,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "shares"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 13151600,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "shares"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 13146085,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 12987996,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 13358930,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 13525179,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 13388626,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 13250867,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 13134071,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 13044875,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 12996958,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 12950958,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 12886372,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 12735520,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 12441313,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 12062627,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 5950403,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfDilutedSharesOutstanding",
      "taxonomy": "us-gaap",
      "label": "Diluted weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Weighted-average shares used for diluted earnings per share. Potential shares are included under the applicable dilution rules, not simply added to outstanding shares.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 12793075,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "shares"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 13151600,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "shares"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 13215066,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 12987996,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 13358930,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 13525179,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 13388626,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 13250867,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 13134071,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 13044875,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 12996958,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 12997009,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 12938661,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 12836239,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 12572647,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 12386036,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 6079378,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareBasic",
      "taxonomy": "us-gaap",
      "label": "Basic earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per basic common share or unit. Inspect attribution, share classes and restatements before comparing periods. This is not a market return.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": -0.76,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD/shares"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": -0.5,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD/shares"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 0.93,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": -1.76,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": -1.05,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": -1.42,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": -0.01,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": -1.45,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": -4.32,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": -3.52,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": -2.51,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 2.82,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 5.4,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 2.76,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 2.39,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 1.17,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 0.3,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareDiluted",
      "taxonomy": "us-gaap",
      "label": "Diluted earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per share under dilution rules. Antidilutive instruments may be excluded. A diluted value can equal the basic value without implying no potential dilution.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": -0.76,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD/shares"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": -0.5,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD/shares"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 0.92,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": -1.76,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": -1.05,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": -1.42,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": -0.01,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": -1.45,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": -4.32,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": -3.52,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": -2.51,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 2.81,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 5.38,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 2.74,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 2.36,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 1.14,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 0.29,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "IncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Current and deferred income tax expense or benefit for continuing operations. This accounting expense differs from cash taxes paid.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 388000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 114000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 363000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 173000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 578000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 2649000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 2417000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": -580000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 2683000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": -9363000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": -17193000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 16632000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 31536000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 16744000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 14908000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 6820000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 1551000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PropertyPlantAndEquipmentNet",
      "taxonomy": "us-gaap",
      "label": "Net property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Carrying amount of property, plant and equipment after accumulated depreciation, depletion and amortization. It is not replacement cost or market value.",
      "observations": [
        {
          "end": "2025-09-30",
          "val": 23244000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 21083000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 24048000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 26598000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 29983000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 29874000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 31474000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 33624000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 37399000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-06-30",
          "val": 43432000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q2I",
          "unit": "USD"
        },
        {
          "end": "2017-03-31",
          "val": 44484000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q1I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 43477000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 44732000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 48709000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 49205000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 48480000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 34433000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 34692000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 33988000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ShareBasedCompensation",
      "taxonomy": "us-gaap",
      "label": "Share-based compensation expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Reported noncash expense for share-based payment arrangements. Noncash treatment does not mean the awards have no economic cost to shareholders.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 1505000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 1304000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 1374000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 1734000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 1970000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 2305000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 2329000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 2318000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 5732000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 5220000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 4539000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 4119000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 544000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 762000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 736000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 445000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 283000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingIncomeLoss",
      "taxonomy": "us-gaap",
      "label": "Operating income or loss",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Operating revenue less operating expenses for the reporting period. It excludes items outside the reported operating result and is not free cash flow.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": -11284000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 7117000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 11328000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": -23136000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": -16871000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": -18039000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 1033000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": -20743000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": -54323000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": -55510000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": -52555000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 53799000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 101227000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 50865000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 44405000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 21108000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 3609000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AssetsCurrent",
      "taxonomy": "us-gaap",
      "label": "Current assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Assets classified as current under the normal operating cycle or one-year boundary. Not all current assets can be converted immediately into cash.",
      "observations": [
        {
          "end": "2025-09-30",
          "val": 88500000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 89366000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 75778000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 59961000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 60030000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 64937000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 71214000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 76654000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 86367000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-06-30",
          "val": 89188000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q2I",
          "unit": "USD"
        },
        {
          "end": "2017-03-31",
          "val": 91733000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q1I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 92851000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 100638000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 106209000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 244008000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 233103000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 187228000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 142581000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 109986000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "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": "2024-10-01",
          "end": "2025-09-30",
          "val": 169000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 187000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 134000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 65000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 38000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 99000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 336000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 39000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 26000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 229000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 471000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 260000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 199000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 43000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 238000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 602000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "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": "2025-09-30",
          "val": 24430000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 17197000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 19798000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 12627000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 15222000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 10346000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 13170000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 14735000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 10505000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 10268000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 13924000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 23351000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 34639000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 41192000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 17681000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 18409000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "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": "2025-09-30",
          "val": 10369000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 8003000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 6659000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 5595000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 6391000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 1593000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 4051000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 4106000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 2599000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 2120000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 4077000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 4964000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 16737000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 17187000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 5042000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 3809000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "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": "2025-09-30",
          "val": 1258000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 736000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 736000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 736000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 5072000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 4337000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 5008000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 4343000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 1843000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 1843000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 1843000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 1843000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 1843000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "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": "2025-09-30",
          "val": 5155000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 1649000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 4805000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 5573000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 7250000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 8331000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 10063000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 8006000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "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": "2025-09-30",
          "val": 12662000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025Q3I",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 14637000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 20157000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 12661000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 12207000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 13594000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 24193000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 14323000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 9435000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-06-30",
          "val": 8327000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q2I",
          "unit": "USD"
        },
        {
          "end": "2017-03-31",
          "val": 16709000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q1I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 13819000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 15392000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 12693000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 24602000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 49756000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 16229000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 19761000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 19107000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "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": "2024-10-01",
          "end": "2025-09-30",
          "val": 615000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 6385000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 0,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 695000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 6805000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "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": "2024-10-01",
          "end": "2025-09-30",
          "val": 48797000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 45456000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 41677000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 41179000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 31715000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 33640000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 36147000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 41355000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 42660000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 38534000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 31199000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 29708000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 26064000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 22952000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InventoryNet",
      "taxonomy": "us-gaap",
      "label": "Net inventory",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Inventory carrying amount after applicable valuation and LIFO reserves. It does not establish realizable selling proceeds or inventory turnover without other inputs.",
      "observations": [
        {
          "end": "2025-09-30",
          "val": 30901000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "unit": "USD"
        },
        {
          "end": "2024-09-30",
          "val": 26222000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024Q3I",
          "unit": "USD"
        },
        {
          "end": "2023-09-30",
          "val": 18430000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023Q3I",
          "unit": "USD"
        },
        {
          "end": "2022-09-30",
          "val": 19995000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022Q3I",
          "unit": "USD"
        },
        {
          "end": "2021-09-30",
          "val": 16196000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021Q3I",
          "unit": "USD"
        },
        {
          "end": "2020-09-30",
          "val": 16933000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020Q3I",
          "unit": "USD"
        },
        {
          "end": "2019-09-30",
          "val": 23855000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019Q3I",
          "unit": "USD"
        },
        {
          "end": "2018-09-30",
          "val": 18812000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-09-30",
          "val": 20752000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017Q3I",
          "unit": "USD"
        },
        {
          "end": "2017-06-30",
          "val": 22382000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q2I",
          "unit": "USD"
        },
        {
          "end": "2017-03-31",
          "val": 22655000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2017Q1I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 24676000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-09-30",
          "val": 30844000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2016Q3I",
          "unit": "USD"
        },
        {
          "end": "2015-09-30",
          "val": 32422000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015Q3I",
          "unit": "USD"
        },
        {
          "end": "2014-09-30",
          "val": 145890000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2014Q3I",
          "unit": "USD"
        },
        {
          "end": "2013-09-30",
          "val": 149548000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2013Q3I",
          "unit": "USD"
        },
        {
          "end": "2012-09-30",
          "val": 83894000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2012Q3I",
          "unit": "USD"
        },
        {
          "end": "2011-09-30",
          "val": 72390000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2011Q3I",
          "unit": "USD"
        },
        {
          "end": "2010-09-30",
          "val": 47395000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2010Q3I",
          "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": "2024-10-01",
          "end": "2025-09-30",
          "val": 32897000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 52573000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 51690000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 18043000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 16294000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 23432000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 31428000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 10972000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": -20683000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": -19363000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": -11200000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 96459000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 139761000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 82064000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 74113000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 47356000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 26573000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CostOfRevenue",
      "taxonomy": "us-gaap",
      "label": "Cost of revenue",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Costs attributed to goods produced and sold and services provided during the period. This is not the sum of every operating expense.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 77906000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 83025000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 72819000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 71210000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 78570000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 64403000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 64381000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 64776000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 94404000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 81423000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 96067000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 140453000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 160846000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 109600000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 98857000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 81177000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 66287000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "SellingGeneralAndAdministrativeExpense",
      "taxonomy": "us-gaap",
      "label": "Selling, general and administrative expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Selling and general administrative costs reported under this concept. It is an expense category, not a substitute for total operating expenses.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 29815000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 26554000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 25952000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 23482000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 21926000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 23068000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 23626000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 19874000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 20238000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 21533000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 22671000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 25291000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 23383000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 18914000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 18051000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 16618000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 14572000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ResearchAndDevelopmentExpense",
      "taxonomy": "us-gaap",
      "label": "Research and development expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Research and development costs recognized as expense. Capitalization policies and acquired projects can make this differ from total cash invested in development.",
      "observations": [
        {
          "start": "2024-10-01",
          "end": "2025-09-30",
          "val": 18916000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2023-10-01",
          "end": "2024-09-30",
          "val": 16251000,
          "accn": "0001437749-25-036009",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-11-21",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2022-10-01",
          "end": "2023-09-30",
          "val": 15863000,
          "accn": "0001437749-24-036050",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-11-22",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2021-10-01",
          "end": "2022-09-30",
          "val": 18104000,
          "accn": "0001437749-23-032446",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-11-17",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2020-10-01",
          "end": "2021-09-30",
          "val": 14839000,
          "accn": "0000950170-22-025429",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-11-18",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2019-10-01",
          "end": "2020-09-30",
          "val": 16569000,
          "accn": "0001564590-21-057727",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-11-19",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2018-10-01",
          "end": "2019-09-30",
          "val": 15495000,
          "accn": "0001564590-20-054742",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-11-20",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2017-10-01",
          "end": "2018-09-30",
          "val": 10832000,
          "accn": "0001564590-19-044161",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-11-22",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2016-10-01",
          "end": "2017-09-30",
          "val": 13782000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2015-10-01",
          "end": "2016-09-30",
          "val": 13851000,
          "accn": "0001564590-18-029718",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-11-16",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2014-10-01",
          "end": "2015-09-30",
          "val": 14694000,
          "accn": "0001564590-17-024421",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-12-01",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-10-01",
          "end": "2014-09-30",
          "val": 16536000,
          "accn": "0001564590-16-029427",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-11-17",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2012-10-01",
          "end": "2013-09-30",
          "val": 14694000,
          "accn": "0001564590-15-010914",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-11-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2011-10-01",
          "end": "2012-09-30",
          "val": 12167000,
          "accn": "0001564590-14-005894",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-11-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-10-01",
          "end": "2011-09-30",
          "val": 11529000,
          "accn": "0001564590-13-001356",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-11-22",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2009-10-01",
          "end": "2010-09-30",
          "val": 9925000,
          "accn": "0001193125-12-499442",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-12-12",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2008-10-01",
          "end": "2009-09-30",
          "val": 8062000,
          "accn": "0001193125-11-336346",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-12-09",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/877048aa4427aa52b67d5c7618e30af1c74a1983d35b5866daddd811380671fc.json.gz"
}
