CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' DEFICIT (Unaudited) - 9 months ended Jun. 30, 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			17,565		$ 17,565
Actuarial losses on pension plan			(4,734)		(4,734)
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		2,687			2,687
Net loss				(39,834)	(39,834)
Balance at ending at Jun. 30, 2017	$ 2	$ 321,608	$ 45,936	$ (369,625)	$ (2,079)
Balance at ending (in shares) at Jun. 30, 2017	20,378,002				20,378,002