Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2016	Jun. 30, 2015	Jun. 28, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (14,087)	$ 3,062	$ (16,460)	$ 310
Other comprehensive income (loss):
Foreign currency translation adjustments	22	(1)	127	(12)
Other comprehensive income (loss)	22	(1)	127	(12)
Comprehensive (loss) income	$ (14,065)	$ 3,061	$ (16,333)	$ 298