FAIR VALUE MEASUREMENT OF FINANCIAL INSTRUMENTS - Level 3 Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Sep. 30, 2023
Recurring Fair Value Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 35,868	$ 35,434
Level 3 | Galileo Technologies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	19.20%
Risk-free rate	4.30%
Equity volatility	92.00%
Level 3 | Recurring Fair Value Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 35,868	$ 35,434