Leases - Supplemental Cash Flow Information and Non-Cash Activity Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash paid for amounts included in measurement of liabilities:
Operating cash flows from operating leases	$ 1,681	$ 1,693
Operating cash flows from finance leases	8	3
Financing cash flows from finance leases	62	53
Right-of-use assets obtained in exchange for new lease liabilities:
Finance leases	0	206
Operating leases	$ 109	$ 236