INCOME TAXES - Changes in Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| Unrecognized Tax Benefits [Roll Forward] | |||
| Balance, beginning of year | $ 4,506 | $ 3,779 | $ 4,123 |
| Increases for tax positions of prior years | 65 | 378 | 100 |
| Decreases for tax positions of prior years | (2,648) | 0 | 0 |
| Increases based on tax positions related to the current year | 1,340 | 1,044 | 769 |
| Decreases due to lapse of statute of limitation | (291) | (695) | (1,213) |
| Balance, end of year | $ 2,972 | $ 4,506 | $ 3,779 |
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|