Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Lease, Cost [Abstract]
Operating lease cost	$ 907	$ 954	$ 2,678	$ 2,836
Variable lease cost	361	287	1,013	828
Short-term Lease, Cost	26	27	69	83
Total lease cost	$ 1,294	$ 1,268	$ 3,760	$ 3,747