Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Leases [Abstract]
Operating	$ 883	$ 1,098	$ 3,884	$ 2,045
Short-term	50	27	266	70
Variable	37	32	148	63
Sublease income	(67)	(71)	(273)	(142)
Total lease costs	$ 903	$ 1,086	$ 4,025	$ 2,036