Leases- Leases Cost Components Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Finance lease expense:
Amortization of right-of use assets on finance leases	$ 55	$ 55
Interest on lease liabilities	2	5
Operating lease expense	1,952	2,173
Variable lease cost	138	157
Total lease expense	$ 2,147	$ 2,390