Condensed Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 27, 2014	Jun. 28, 2013
Net loss	$ (3,116)	$ (1,556)	$ (22,388)	$ (29,672)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(65)	(157)	(454)	(342)
Defined benefit pension plan adjustments	21	81	41	165
Total comprehensive loss	$ (3,160)	$ (1,632)	$ (22,801)	$ (29,849)