Income Taxes - Schedule of Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Current:
Federal	$ 911	$ 945	$ 1,350
State	472	1,186	186
Foreign	73	66	88
Current income tax provision	1,456	2,197	1,624
Deferred:
Federal	(1,062)	1,045	366
State	(30)	(91)	457
Foreign	97	519	(3)
Deferred income tax provision	(995)	1,473	820
Total income tax provision	$ 461	$ 3,670	$ 2,444