Income Taxes - Schedule of Income Taxes from Continuing Operations Before Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Current income tax provision (benefit):
U.S. federal	$ 0	$ (19)
U.S. state and local	(27)	5
Non-U.S.	(109)	472
Total current tax provision (benefit)	(136)	458
Deferred income tax provision (benefit):
U.S. federal	8	(462)
U.S. state and local	2	(30)
Non-U.S.	(575)	(327)
Total deferred tax provision (benefit)	(565)	(819)
Income tax benefit	$ (701)	$ (361)