LEASES - Supplemental cash flow information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 8,540	$ 1,389
Operating cash flows from finance leases	33	184
Finance cash flows from finance leases	4	286
Non-cash lease activity:
ROU assets obtained in exchange for new operating lease liabilities	31,697	6,285
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 69	$ 17