LEASES - Components of lease expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Operating lease costs:
Fixed operating lease costs	$ 1,120	$ 242	$ 2,203	$ 474
Short-term lease costs	19	42	44	52
Lease income	(988)	(159)	(1,165)	(318)
Finance lease costs:
Amortization of right-of-use asset expense	6	35	12	72
Interest on finance lease liability	0	68	1	137
Total lease cost	$ 157	$ 228	$ 1,095	$ 417