SUPPLEMENTAL BALANCE SHEET INFORMATION - Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024
Accrued Liabilities and Other Liabilities [Abstract]
Accrued compensation	$ 8,807	$ 10,851
Non-income taxes	4,197	4,409
Accrued interest	1,455	3,017
Other	6,041	4,941
Agreement in Principle	5,000	5,000
Accrued expenses and other current liabilities	$ 25,500	$ 28,218