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FAIR VALUE MEASUREMENT OF FINANCIAL INSTRUMENTS - Level 3 Unobservable Inputs (Details) $ in Thousands	Jun. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Recurring Fair Value Measurements | Galileo Technologies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value (in thousands)	$ 38,972	$ 27,044
Level 3 | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Inputs	0.175	0.187
Level 3 | Risk-free rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Inputs	0.040	0.035
Level 3 | Equity volatility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Inputs	0.950	0.660
Level 3 | Recurring Fair Value Measurements | Galileo Technologies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value (in thousands)	$ 38,972	$ 27,044

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