CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (Unaudited) - 6 months ended Mar. 31, 2017 - 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. 24, 2016	$ 1	$ 614	$ 33,105	$ (329,791)	$ (296,071)
Balance at beginning (in shares) at Sep. 24, 2016	11,801,369				11,801,369
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation adjustments			18,134		$ 18,134
Actuarial losses on pension plan			(3,123)		(3,123)
Shares issued in Merger	$ 1	326,237			326,238
Shares issued in Merger (in shares)	8,412,097
Earnout liability related to Merger		(9,575)			(9,575)
Sale of common stock		1,645			1,645
Sale of common stock (in shares)	164,536
Stock-based compensation expense		1,327			1,327
Net loss				(31,503)	(31,503)
Balance at ending at Mar. 31, 2017	$ 2	$ 320,248	$ 48,116	$ (361,294)	$ 7,072
Balance at ending (in shares) at Mar. 31, 2017	20,378,002				20,363,927