Summary of Significant Accounting Policies - Summary of Change in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Receivables [Abstract]
Beginning balance	$ 371	$ 879	$ 1,394
Credit loss provision	3,626	(431)	(415)
Write-offs, net of recoveries		18	(112)
Foreign exchange impact on ending balance	134	(95)	12
Ending balance	$ 4,131	$ 371	$ 879