LEASES - Components of lease expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Operating lease costs:
Fixed operating lease costs	$ 3,322	$ 1,120	$ 5,914	$ 2,203
Short-term lease costs	50	19	62	44
Lease income	(811)	(988)	(1,485)	(1,165)
Finance lease costs:
Amortization of ROU asset expense	11	6	21	12
Interest on finance lease liability	1		2	1
Total lease cost	$ 2,573	$ 157	$ 4,514	$ 1,095