Leases - Lease Cost Components Schedule (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finance lease expense:
Amortization of right-of use assets on finance leases	$ 12	$ 16
Interest on lease liabilities	1	1
Operating lease expense	429	549
Variable lease cost	30	35
Total lease expense	$ 472	$ 601