Income Taxes - Schedule of Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Current:
Federal	$ 945	$ 1,350	$ 973
State	1,186	186	201
Foreign	66	88	449
Current income tax provision	2,197	1,624	1,623
Deferred:
Federal	1,045	366	(1,834)
State	(91)	457	(247)
Foreign	519	(3)	(89)
Deferred income tax provision	1,473	820	(2,170)
Total income tax provision (benefit)	$ 3,670	$ 2,444	$ (547)