Income Taxes - Schedule of Income Taxes from Continuing Operations Before Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Current income tax provision (benefit):
U.S. federal	$ 0	$ (1)
U.S. state and local	14	8
Non-U.S.	(9)	59
Total current tax provision	5	66
Deferred income tax provision (benefit):
U.S. federal	10	10
U.S. state and local	3	(2)
Non-U.S.	(61)	(1,296)
Total deferred tax benefit	(48)	(1,288)
Income tax benefit	$ (43)	$ (1,222)