Income Taxes - Schedule of Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Current:
Federal	$ 18,129	$ 557	$ 911
State	4,036	403	472
Foreign	107	7	73
Current income tax provision	22,272	967	1,456
Deferred:
Federal	(7,458)	(154)	(1,062)
State	(1,499)	(41)	(30)
Foreign	1,110	(4,666)	97
Deferred income tax provision	(7,847)	(4,861)	(995)
Total income tax provision (benefit)	$ 14,425	$ (3,894)	$ 461