Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Finance lease cost:
Amortization of ROU asset	$ 430	$ 430
Interest on lease liabilities	759	784
Total finance lease cost	1,189	1,214
Operating lease costs:
Operating lease cost	1,173	1,100
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flow from finance leases	759	784
Operating cash flow from operating leases	1,173	1,100
Financing cash flows from finance leases	265	228
Total cash paid for amount included in measurement of lease liabilities	$ 2,197	$ 2,112