SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| Current assets: | |||
| Accounts receivable | $ 6,010 | $ 5,621 | $ 26,457 |
| Inventories | 11,689 | 27,019 | (23,990) |
| Contract assets | (25,806) | (15,304) | (23,465) |
| Other current assets | 18,153 | 8,483 | (3,259) |
| Total change in current assets | 10,046 | 25,819 | (24,257) |
| Current liabilities: | |||
| Trade accounts payable | 2,963 | (6,492) | (9,215) |
| Accrued compensation | (43,119) | 27,597 | (648) |
| Accrued income taxes | (7,405) | (4,834) | 3,343 |
| Accrued rebates | (2,379) | 144 | 296 |
| Contract liabilities | (20,663) | (9,426) | 4,971 |
| Other current liabilities | 15,163 | (18,112) | (9,993) |
| Total change in current liabilities | (55,440) | (11,123) | (11,246) |
| Net change | $ (45,394) | $ 14,696 | $ (35,503) |
| X | ||||||||||
- Definition Increase (Decrease), Accrued Rebates, Current No definition available.
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| X | ||||||||||
- Definition Change in recurring obligations of a business that arise from the acquisition of merchandise, materials, supplies and services used in the production and sale of goods and services. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the period in accrued salaries. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate amount of assets used to generate operating income. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in asset and (increase) decrease in liability, used in operating activity in reconciling net income to reflect cash provided by (used in) operating activity when indirect cash flow method is applied. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities that result from activities that generate operating income. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in current assets classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in current liabilities classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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