FAIR VALUE MEASUREMENT OF FINANCIAL INSTRUMENTS - Level 3 Unobservable Inputs (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Sep. 30, 2022
Recurring Fair Value Measurements
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value	$ 35,001	$ 33,000
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Discount rate	22.40%
Risk-free rate	4.00%
Equity volatility	92.50%
Level 3 | Recurring Fair Value Measurements
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value	$ 35,001	$ 33,000