CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' DEFICIT (Unaudited) - 3 months ended Dec. 31, 2018 - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Total
Balance at beginning at Sep. 30, 2018	$ 2	$ 328,452	$ 58,580	$ (399,501)	$ (12,467)
Balance at beginning (in shares) at Sep. 30, 2018	20,860,591				20,860,591
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation adjustments			(6)		$ (6)
Actuarial losses on pension plan			(2,825)		(2,825)
Change in fair value of hedging instrument			2,601		2,601
Reclassification of gain on hedging instrument to comprehensive income			(2,362)		(2,362)
Shares issued upon net settlement of RSUs		(4)			(4)
Shares issued upon net settlement of RSUs (in shares)	9,806
Stock-based compensation expense		1,407			1,407
Net loss				(4,729)	(4,729)
Balance at ending at Dec. 31, 2018	$ 2	$ 329,855	$ 55,988	$ (404,230)	$ (18,385)
Balance at ending (in shares) at Dec. 31, 2018	20,870,397				20,870,397