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FAIR VALUE MEASUREMENTS - Changes in Level 3 Financial Instruments Measured on a Recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Exchangeable notes, fair value | $ 103,990 |  |
Accrued Contingent Consideration |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance, beginning | 22,833 | $ 36,229 |
Contingent consideration accrued at time of business combination | 0 | 5,481 |
Change in fair value of contingent consideration included in Operating expenses | 1,443 | 4,927 |
Contingent consideration paid | (4,212) | (9,755) |
Balance, ending | 20,064 | $ 36,882 |
Accrued Expenses and Other Current Liabilities |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Contingent consideration | 18,847 |  | $ 21,385
Other Long-term Liabilities |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Contingent consideration | $ 1,217 |  | $ 1,448

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