Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease cost	$ 256	$ 378
Less: sublease income	0	(162)
Variable lease cost	30	108
Short-term lease cost	400	387
Total lease cost	$ 686	$ 711