CIK 0000717720 · QID Q7912737
| Fakt | Wert | Zeit | Quelle |
|---|---|---|---|
| accounts_receivable | {"amount": 1035000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2026-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1088000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2026-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1161000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2025-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1287000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2025-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1327000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2025-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1336000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2025-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1259000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2024-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1229000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2024-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1310000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2024-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1302000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2024-01-31 | sec_edgar |
| accounts_receivable | {"amount": 4464000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2023-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1505000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2023-07-31 | sec_edgar |
| accounts_receivable | {"amount": 2124000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2023-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1779000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2023-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1649000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2022-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1355000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2022-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1677000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2022-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1802000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2022-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1595000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2021-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1467000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2021-07-31 | sec_edgar |
| accounts_receivable | {"amount": 3985000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2021-04-30 | sec_edgar |
| accounts_receivable | {"amount": 4523000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2021-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1600000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2020-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1579000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2020-07-31 | sec_edgar |
| accounts_receivable | {"amount": 4438000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2020-04-30 | sec_edgar |
| accounts_receivable | {"amount": 5165000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2020-01-31 | sec_edgar |
| accounts_receivable | {"amount": 4320000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2019-10-31 | sec_edgar |
| accounts_receivable | {"amount": 3750000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2019-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1504000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2019-04-30 | sec_edgar |
| accounts_receivable | {"amount": 3002000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2019-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1132000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1075000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1049000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-04-30 | sec_edgar |
| accounts_receivable | {"amount": 2803000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1081000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1043000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1018000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-04-30 | sec_edgar |
| accounts_receivable | {"amount": 2022000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1734000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1482000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1254000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1349000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1171000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2015-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1375000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2015-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1409000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2015-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1290000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2015-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1248000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2014-10-31 | sec_edgar |
| accounts_receivable | {"amount": 731000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2014-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1206000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2014-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1435000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2014-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1487000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2013-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1175000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2013-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1278000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2013-04-30 | sec_edgar |
| accounts_receivable | {"amount": 1211000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2013-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1021000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2012-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1253000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2012-07-31 | sec_edgar |
| accounts_receivable | {"amount": 902000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2012-04-30 | sec_edgar |
| accounts_receivable | {"amount": 713000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2012-01-31 | sec_edgar |
| accounts_receivable | {"amount": 1049000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2011-10-31 | sec_edgar |
| accounts_receivable | {"amount": 1298000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2011-07-31 | sec_edgar |
| accounts_receivable | {"amount": 1599000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2011-04-30 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2026-04-30 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2026-01-31 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2025-10-31 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2025-07-31 | sec_edgar |
| capex | {"amount": 178000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2025-04-30 | sec_edgar |
| capex | {"amount": 174000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2025-01-31 | sec_edgar |
| capex | {"amount": 65000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2024-10-31 | sec_edgar |
| capex | {"amount": 4000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2024-07-31 | sec_edgar |
| capex | {"amount": 15000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2024-04-30 | sec_edgar |
| capex | {"amount": 14000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2024-01-31 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2023-10-31 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2023-07-31 | sec_edgar |
| capex | {"amount": 30000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2023-04-30 | sec_edgar |
| capex | {"amount": 23000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2023-01-31 | sec_edgar |
| capex | {"amount": 23000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2022-10-31 | sec_edgar |
| capex | {"amount": 23000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2022-07-31 | sec_edgar |
| capex | {"amount": 11000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2022-04-30 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2022-01-31 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2022-01-31 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2021-10-31 | sec_edgar |
| capex | {"amount": 0, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currency": | 2021-07-31 | sec_edgar |
| capex | {"amount": 33000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2021-04-30 | sec_edgar |
| capex | {"amount": 26000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2021-01-31 | sec_edgar |
| capex | {"amount": 26000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2021-01-31 | sec_edgar |
| capex | {"amount": 21000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2020-10-31 | sec_edgar |
| capex | {"amount": 7000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2020-07-31 | sec_edgar |
| capex | {"amount": 2000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2020-04-30 | sec_edgar |
| capex | {"amount": 2000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2020-01-31 | sec_edgar |
| capex | {"amount": 2000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2019-10-31 | sec_edgar |
| capex | {"amount": 11000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2019-04-30 | sec_edgar |
| capex | {"amount": 6000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2019-01-31 | sec_edgar |
| capex | {"amount": 6000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2018-10-31 | sec_edgar |
| capex | {"amount": 5000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2018-07-31 | sec_edgar |
| capex | {"amount": 408000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2018-04-30 | sec_edgar |
| capex | {"amount": 398000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2018-01-31 | sec_edgar |
| capex | {"amount": 393000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2017-10-31 | sec_edgar |
| capex | {"amount": 230000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2017-07-31 | sec_edgar |
| capex | {"amount": 1276000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr | 2017-04-30 | sec_edgar |
| capex | {"amount": 879000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2017-01-31 | sec_edgar |
| capex | {"amount": 593000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2016-10-31 | sec_edgar |
| capex | {"amount": 515000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2016-07-31 | sec_edgar |
| capex | {"amount": 227000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2016-04-30 | sec_edgar |
| capex | {"amount": 36000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2016-01-31 | sec_edgar |
| capex | {"amount": 120000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2015-04-30 | sec_edgar |
| capex | {"amount": 99000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2015-01-31 | sec_edgar |
| capex | {"amount": 99000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2014-10-31 | sec_edgar |
| capex | {"amount": 74000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2014-07-31 | sec_edgar |
| capex | {"amount": 206000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2014-04-30 | sec_edgar |
| capex | {"amount": 137000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2014-01-31 | sec_edgar |
| capex | {"amount": 153000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2013-10-31 | sec_edgar |
| capex | {"amount": 133000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2013-07-31 | sec_edgar |
| capex | {"amount": 331000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2013-04-30 | sec_edgar |
| capex | {"amount": 108000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2013-01-31 | sec_edgar |
| capex | {"amount": 39000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2012-10-31 | sec_edgar |
| capex | {"amount": 15000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2012-07-31 | sec_edgar |
| capex | {"amount": 48000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2012-04-30 | sec_edgar |
| capex | {"amount": 31000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2012-01-31 | sec_edgar |
| capex | {"amount": 31000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2011-10-31 | sec_edgar |
| capex | {"amount": 4000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "currenc | 2011-07-31 | sec_edgar |
| capex | {"amount": 106000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre | 2011-04-30 | sec_edgar |
| capex | {"amount": 98000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2011-01-31 | sec_edgar |
| capex | {"amount": 74000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2010-10-31 | sec_edgar |
| capex | {"amount": 22000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2010-07-31 | sec_edgar |
| capex | {"amount": 81000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curren | 2010-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 24180000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2026-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 46463000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2026-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 43606000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2025-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 33708000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2025-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 34077000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2025-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 26816000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2025-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 11293000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2024-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 15628000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2024-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 4390000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2024-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 5780000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2024-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 3924000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2023-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 9551000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2023-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 7590000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2023-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 11861000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2023-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 12668000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2022-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 14802000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2022-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 29703000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2022-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 29909000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2022-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 24958000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2021-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 25035000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2021-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 19171000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2021-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 16182000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2021-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 8689000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2020-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 7769000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2020-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 4954000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2020-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 3555000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2020-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 4631000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2019-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 3718000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2019-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6493000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2019-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 4364000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2019-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 4585000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2018-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 4992000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2018-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 5941000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2018-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 4218000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2018-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 4360000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2017-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6309000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2017-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6557000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2017-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 6528000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2017-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6737000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2016-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 21395000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2016-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 13122000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2016-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 10351000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2016-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 11583000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2015-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6223000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2015-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 5874000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2015-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 6651000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2015-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 5154000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2014-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6912000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2014-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 5788000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2014-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 4808000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2014-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 3895000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2013-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 4021000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2013-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6840000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2013-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 8743000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2013-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 8223000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2012-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 9781000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2012-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 12042000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2012-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 12538000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2012-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 9862000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2011-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 7186000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2011-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6802000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2011-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 7575000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2011-01-31 | sec_edgar |
| cash_and_equivalents | {"amount": 8712000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2010-10-31 | sec_edgar |
| cash_and_equivalents | {"amount": 14434000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2010-07-31 | sec_edgar |
| cash_and_equivalents | {"amount": 16435000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2010-04-30 | sec_edgar |
| cash_and_equivalents | {"amount": 42936000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2009-04-30 | sec_edgar |
| cash_and_restricted_cash | {"amount": 24485000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2026-04-30 | sec_edgar |
| cash_and_restricted_cash | {"amount": 46768000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2026-01-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 43911000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2025-10-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 34013000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2025-07-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 34382000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2025-04-30 | sec_edgar |
| cash_and_restricted_cash | {"amount": 27121000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2025-01-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 11598000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2024-10-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 15933000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2024-07-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 4695000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCash | 2024-04-30 | sec_edgar |