Income Taxes - Schedule of Components of Loss from Continuing Operations Before Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
U.S.	$ (1,523)	$ 10,071
Non-U.S.	(442)	(1,091)
Income (loss) before income tax benefit	$ (1,965)	$ 8,980