CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive (Loss) Income [Abstract]
Net loss	$ (14,632)	$ (49,787)	$ (22,383)
Other comprehensive (loss) income:
Foreign currency translation adjustments	109	(355)	(342)
Comprehensive loss	$ (14,523)	$ (50,142)	$ (22,725)