Summary of Operations and Significant Accounting Policies - Summary of Activity for Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Beginning balance	$ 7,231	$ 1,624	$ 1,224
New deposits	4,058	7,231	1,624
Deferred revenue	169
Revenue recognized	(3,005)	(1,624)	(1,224)
Adjustment	(435)
Ending balance	$ 8,018	$ 7,231	$ 1,624