Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Operating	$ 869	$ 903	$ 2,684	$ 2,763
Short-term	33	18	85	88
Variable	44	40	89	70
Sublease income	(69)	(46)	(188)	(233)
Total lease costs	$ 877	$ 915	$ 2,670	$ 2,688