Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (652)	$ 297	$ (406)	$ 784
Other comprehensive income, net of tax	0	0	0	0
Comprehensive (loss) income	$ (652)	$ 297	$ (406)	$ 784