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FAIR VALUE MEASUREMENTS - Additional Information (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Sep. 30, 2025
--- | --- | ---
Accrued Expenses and Other Current Liabilities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent consideration | $ 1,023 | $ 82
Other Long-term Liabilities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent consideration | $ 9,650 | $ 3,489

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