LEASES - Supplemental cash flow information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,096	$ 229
Operating cash flows from finance leases	1	69
Finance cash flows from finance leases	6	108
Non-cash lease activity:
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 17,036	$ 448