Leases - Lease Cost Components Schedule (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finance lease expense:
Amortization of right-of use assets on finance leases	$ 16	$ 14
Interest on lease liabilities	1	2
Operating lease expense:	549	537
Variable lease cost:	35	39
Total lease expense	$ 601	$ 592