Income Taxes - Schedule of Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Current:
Federal	$ 973	$ (7,782)	$ (1,395)
State	201	(101)	449
Foreign	449	350	899
Current income tax provision	1,623	(7,533)	(47)
Deferred:
Federal	(1,834)	392	1,923
State	(247)	(515)	47
Foreign	(89)	223	360
Deferred income tax provision	(2,170)	100	2,330
Total income tax provision (benefit)	$ (547)	$ (7,433)	$ 2,283