Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (328)	$ (652)	$ (227)	$ (406)
Comprehensive loss	$ (328)	$ (652)	$ (227)	$ (406)