CIK 0000015847
| Fakt | Wert | Zeit | Quelle |
|---|---|---|---|
| accounts_payable | {"amount": 13102000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2026-04-30 | sec_edgar |
| accounts_payable | {"amount": 17937000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2026-01-31 | sec_edgar |
| accounts_payable | {"amount": 9862000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2025-10-31 | sec_edgar |
| accounts_payable | {"amount": 17419000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2025-07-31 | sec_edgar |
| accounts_payable | {"amount": 8623000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2025-04-30 | sec_edgar |
| accounts_payable | {"amount": 13868000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2025-01-31 | sec_edgar |
| accounts_payable | {"amount": 2876000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2024-10-31 | sec_edgar |
| accounts_payable | {"amount": 4845000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2024-07-31 | sec_edgar |
| accounts_payable | {"amount": 5291000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2024-04-30 | sec_edgar |
| accounts_payable | {"amount": 8496000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2024-01-31 | sec_edgar |
| accounts_payable | {"amount": 9820000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2023-10-31 | sec_edgar |
| accounts_payable | {"amount": 4168000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2023-07-31 | sec_edgar |
| accounts_payable | {"amount": 5320000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2023-04-30 | sec_edgar |
| accounts_payable | {"amount": 6672000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2023-01-31 | sec_edgar |
| accounts_payable | {"amount": 2616000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2022-10-31 | sec_edgar |
| accounts_payable | {"amount": 2736000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2022-07-31 | sec_edgar |
| accounts_payable | {"amount": 2773000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2022-04-30 | sec_edgar |
| accounts_payable | {"amount": 2312000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2022-01-31 | sec_edgar |
| accounts_payable | {"amount": 2743000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2021-10-31 | sec_edgar |
| accounts_payable | {"amount": 2316000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2021-07-31 | sec_edgar |
| accounts_payable | {"amount": 1893000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2021-04-30 | sec_edgar |
| accounts_payable | {"amount": 1990000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2021-01-31 | sec_edgar |
| accounts_payable | {"amount": 1755000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2020-10-31 | sec_edgar |
| accounts_payable | {"amount": 1356000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2020-07-31 | sec_edgar |
| accounts_payable | {"amount": 962000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2020-04-30 | sec_edgar |
| accounts_payable | {"amount": 1681000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2020-01-31 | sec_edgar |
| accounts_payable | {"amount": 1513000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2019-10-31 | sec_edgar |
| accounts_payable | {"amount": 1736000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2019-07-31 | sec_edgar |
| accounts_payable | {"amount": 1774000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2019-04-30 | sec_edgar |
| accounts_payable | {"amount": 1695000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2019-01-31 | sec_edgar |
| accounts_payable | {"amount": 1935000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2018-10-31 | sec_edgar |
| accounts_payable | {"amount": 1927000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2018-07-30 | sec_edgar |
| accounts_payable | {"amount": 2215000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2018-04-30 | sec_edgar |
| accounts_payable | {"amount": 1425000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2018-01-31 | sec_edgar |
| accounts_payable | {"amount": 1394000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2017-10-31 | sec_edgar |
| accounts_payable | {"amount": 1854000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2017-07-31 | sec_edgar |
| accounts_payable | {"amount": 1919000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2017-04-30 | sec_edgar |
| accounts_payable | {"amount": 1530000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2017-01-31 | sec_edgar |
| accounts_payable | {"amount": 1640000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2016-10-31 | sec_edgar |
| accounts_payable | {"amount": 1774000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2016-07-31 | sec_edgar |
| accounts_payable | {"amount": 2018000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2016-04-30 | sec_edgar |
| accounts_payable | {"amount": 1885000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2016-01-31 | sec_edgar |
| accounts_payable | {"amount": 1686000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2015-10-31 | sec_edgar |
| accounts_payable | {"amount": 1502000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2015-07-31 | sec_edgar |
| accounts_payable | {"amount": 1874000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2015-04-30 | sec_edgar |
| accounts_payable | {"amount": 1533000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2015-01-31 | sec_edgar |
| accounts_payable | {"amount": 1208000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2014-10-31 | sec_edgar |
| accounts_payable | {"amount": 1362000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2014-07-31 | sec_edgar |
| accounts_payable | {"amount": 1375000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2014-04-30 | sec_edgar |
| accounts_payable | {"amount": 1251000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2014-01-31 | sec_edgar |
| accounts_payable | {"amount": 1817000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2013-10-31 | sec_edgar |
| accounts_payable | {"amount": 1550000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2013-07-31 | sec_edgar |
| accounts_payable | {"amount": 1509000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2013-04-30 | sec_edgar |
| accounts_payable | {"amount": 1708000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2013-01-31 | sec_edgar |
| accounts_payable | {"amount": 1760000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2012-10-31 | sec_edgar |
| accounts_payable | {"amount": 1936000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2012-07-31 | sec_edgar |
| accounts_payable | {"amount": 1169000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2012-04-30 | sec_edgar |
| accounts_payable | {"amount": 1517649, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2012-01-31 | sec_edgar |
| accounts_payable | {"amount": 2352492, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2011-10-31 | sec_edgar |
| accounts_payable | {"amount": 1527150, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2011-07-31 | sec_edgar |
| accounts_payable | {"amount": 2094000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2011-04-30 | sec_edgar |
| accounts_receivable | {"amount": 13996000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2026-04-30 | sec_edgar |
| accounts_receivable | {"amount": 12168000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2026-01-31 | sec_edgar |
| accounts_receivable | {"amount": 7517000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2025-10-31 | sec_edgar |
| accounts_receivable | {"amount": 7598000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2025-07-31 | sec_edgar |
| accounts_receivable | {"amount": 5867000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2025-04-30 | sec_edgar |
| accounts_receivable | {"amount": 6286000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2025-01-31 | sec_edgar |
| accounts_receivable | {"amount": 5402000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2024-10-31 | sec_edgar |
| accounts_receivable | {"amount": 7326000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2024-07-31 | sec_edgar |
| accounts_receivable | {"amount": 5776000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2024-04-30 | sec_edgar |
| accounts_receivable | {"amount": 6140000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2024-01-31 | sec_edgar |
| accounts_receivable | {"amount": 5578000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2023-10-31 | sec_edgar |
| accounts_receivable | {"amount": 3260000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2023-07-31 | sec_edgar |
| accounts_receivable | {"amount": 3793000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2023-04-30 | sec_edgar |
| accounts_receivable | {"amount": 4754000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2023-01-31 | sec_edgar |
| accounts_receivable | {"amount": 3960000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2022-10-31 | sec_edgar |
| accounts_receivable | {"amount": 3615000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2022-07-31 | sec_edgar |
| accounts_receivable | {"amount": 3636000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2022-04-30 | sec_edgar |
| accounts_receivable | {"amount": 2172000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2022-01-31 | sec_edgar |
| accounts_receivable | {"amount": 3566000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2021-10-31 | sec_edgar |
| accounts_receivable | {"amount": 2957000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2021-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1961000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2021-04-30 | sec_edgar |
| accounts_receivable | {"amount": 2982000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2021-01-31 | sec_edgar |
| accounts_receivable | {"amount": 2270000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2020-10-31 | sec_edgar |
| accounts_receivable | {"amount": 3830000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2020-07-31 | sec_edgar |
| accounts_receivable | {"amount": 2784000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2020-04-30 | sec_edgar |
| accounts_receivable | {"amount": 3076000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2020-01-31 | sec_edgar |
| accounts_receivable | {"amount": 2459000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2019-10-31 | sec_edgar |
| accounts_receivable | {"amount": 5382000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2019-07-31 | sec_edgar |
| accounts_receivable | {"amount": 3265000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2019-04-30 | sec_edgar |
| accounts_receivable | {"amount": 3775000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2019-01-31 | sec_edgar |
| accounts_receivable | {"amount": 4268000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-10-31 | sec_edgar |
| accounts_receivable | {"amount": 3225000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-07-30 | sec_edgar |
| accounts_receivable | {"amount": 3107000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1944000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-01-31 | sec_edgar |
| accounts_receivable | {"amount": 2892000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-10-31 | sec_edgar |
| accounts_receivable | {"amount": 3781000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-07-31 | sec_edgar |
| accounts_receivable | {"amount": 4095000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-04-30 | sec_edgar |
| accounts_receivable | {"amount": 3030000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-01-31 | sec_edgar |
| accounts_receivable | {"amount": 3228000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-10-31 | sec_edgar |
| accounts_receivable | {"amount": 2164000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1574000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-04-30 | sec_edgar |
| accounts_receivable | {"amount": 2313000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1985000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2015-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1934000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2015-07-31 | sec_edgar |
| accounts_receivable | {"amount": 944000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2015-04-30 | sec_edgar |
| accounts_receivable | {"amount": 2456000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2015-01-31 | sec_edgar |
| accounts_receivable | {"amount": 2500000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2014-10-31 | sec_edgar |
| accounts_receivable | {"amount": 2966000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2014-07-31 | sec_edgar |
| accounts_receivable | {"amount": 3109000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2014-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1862000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2014-01-31 | sec_edgar |
| accounts_receivable | {"amount": 2256000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2013-10-31 | sec_edgar |
| accounts_receivable | {"amount": 3018000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2013-07-31 | sec_edgar |
| accounts_receivable | {"amount": 2697000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2013-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1968000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2013-01-31 | sec_edgar |
| accounts_receivable | {"amount": 2847000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2012-10-31 | sec_edgar |
| accounts_receivable | {"amount": 5276000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2012-07-31 | sec_edgar |
| accounts_receivable | {"amount": 3589000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2012-04-30 | sec_edgar |
| accounts_receivable | {"amount": 3999797, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2012-01-31 | sec_edgar |
| accounts_receivable | {"amount": 2179251, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2011-10-31 | sec_edgar |
| accounts_receivable | {"amount": 2369924, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2011-07-31 | sec_edgar |
| accounts_receivable | {"amount": 2128000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2011-04-30 | sec_edgar |
| capex | {"amount": 6538000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2026-04-30 | sec_edgar |
| capex | {"amount": 4745000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2026-01-31 | sec_edgar |
| capex | {"amount": 3289000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2025-10-31 | sec_edgar |
| capex | {"amount": 1438000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2025-07-31 | sec_edgar |
| capex | {"amount": 8259000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2025-04-30 | sec_edgar |
| capex | {"amount": 6141000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2025-01-31 | sec_edgar |
| capex | {"amount": 4607000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2024-10-31 | sec_edgar |
| capex | {"amount": 1182000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2024-07-31 | sec_edgar |
| capex | {"amount": 8740000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2024-04-30 | sec_edgar |
| capex | {"amount": 5571000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2024-01-31 | sec_edgar |
| capex | {"amount": 4354000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2023-10-31 | sec_edgar |
| capex | {"amount": 901000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2023-07-31 | sec_edgar |
| capex | {"amount": 6510000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2023-04-30 | sec_edgar |
| capex | {"amount": 4298000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2023-01-31 | sec_edgar |
| capex | {"amount": 4298000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2023-01-23 | sec_edgar |
| capex | {"amount": 3253000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2022-10-31 | sec_edgar |
| capex | {"amount": 1797000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2022-07-31 | sec_edgar |
| capex | {"amount": 9579000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2022-04-30 | sec_edgar |
| capex | {"amount": 5312000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2022-01-31 | sec_edgar |
| capex | {"amount": 5312000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2022-01-23 | sec_edgar |
| capex | {"amount": 3381000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2021-10-31 | sec_edgar |
| capex | {"amount": 1275000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2021-07-31 | sec_edgar |
| capex | {"amount": 6992000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2021-04-30 | sec_edgar |
| capex | {"amount": 5351000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2021-01-31 | sec_edgar |
| capex | {"amount": 3401000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2020-10-31 | sec_edgar |
| capex | {"amount": 1977000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2020-07-31 | sec_edgar |
| capex | {"amount": 3165000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2020-04-30 | sec_edgar |
| capex | {"amount": 1835000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2020-01-31 | sec_edgar |
| capex | {"amount": 677000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2019-10-31 | sec_edgar |
| capex | {"amount": 58000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2019-07-31 | sec_edgar |
| capex | {"amount": 4985000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2019-04-30 | sec_edgar |
| capex | {"amount": 1499000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2019-01-31 | sec_edgar |
| capex | {"amount": 329000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2018-10-31 | sec_edgar |
| capex | {"amount": 227000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2018-07-31 | sec_edgar |
| capex | {"amount": 2289000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2018-04-30 | sec_edgar |
| capex | {"amount": 1834000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2018-01-31 | sec_edgar |
| capex | {"amount": 1189000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2017-10-31 | sec_edgar |
| capex | {"amount": 730000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2017-07-31 | sec_edgar |
| capex | {"amount": 3180000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2017-04-30 | sec_edgar |
| capex | {"amount": 1957000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2017-01-31 | sec_edgar |
| capex | {"amount": 911000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2016-10-31 | sec_edgar |
| capex | {"amount": 423000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2016-07-31 | sec_edgar |
| capex | {"amount": 2757000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2016-04-30 | sec_edgar |
| capex | {"amount": 868000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2016-01-31 | sec_edgar |
| capex | {"amount": 602000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2015-10-31 | sec_edgar |
| capex | {"amount": 321000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2015-07-31 | sec_edgar |
| capex | {"amount": 5065000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2015-04-30 | sec_edgar |
| capex | {"amount": 2183000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2015-01-31 | sec_edgar |
| capex | {"amount": 847000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2014-10-31 | sec_edgar |
| capex | {"amount": 2183000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2014-07-31 | sec_edgar |
| capex | {"amount": 290000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2014-04-30 | sec_edgar |
| capex | {"amount": 174000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2014-01-31 | sec_edgar |
| capex | {"amount": 166000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2013-10-31 | sec_edgar |
| capex | {"amount": 174000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2013-07-31 | sec_edgar |
| capex | {"amount": 8159000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2013-04-30 | sec_edgar |
| capex | {"amount": 6724000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2013-01-31 | sec_edgar |
| capex | {"amount": 6952000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2012-10-31 | sec_edgar |
| capex | {"amount": 402000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2012-07-31 | sec_edgar |
| capex | {"amount": 1351000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2012-04-30 | sec_edgar |
| capex | {"amount": 1229000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2012-01-31 | sec_edgar |
| capex | {"amount": 1211000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2011-10-31 | sec_edgar |
| capex | {"amount": 17000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2011-07-31 | sec_edgar |
| capex | {"amount": 3792000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2011-04-30 | sec_edgar |
| capex | {"amount": 1451577, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2011-01-31 | sec_edgar |
| capex | {"amount": 1297006, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2010-10-31 | sec_edgar |
| capex | {"amount": 305457, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2010-07-31 | sec_edgar |
| capex | {"amount": 506000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2010-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 35124000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2026-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 36492000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2026-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 25226000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2025-04-30 | sec_edgar |
| cashflow_financing | {"amount": -11514000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2026-04-30 | sec_edgar |
| cashflow_financing | {"amount": -10072000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2026-01-31 | sec_edgar |
| cashflow_financing | {"amount": -7749000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2025-10-31 | sec_edgar |
| cashflow_financing | {"amount": -5043000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2025-07-31 | sec_edgar |
| cashflow_financing | {"amount": -5555000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2025-04-30 | sec_edgar |
| cashflow_financing | {"amount": -3354000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2025-01-31 | sec_edgar |
| cashflow_financing | {"amount": -3906000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2024-10-31 | sec_edgar |
| cashflow_financing | {"amount": -1729000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2024-07-31 | sec_edgar |