Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 442	$ 490	$ 36	$ 1,274
Other comprehensive income, net of tax	0	0	0	0
Comprehensive income	$ 442	$ 490	$ 36	$ 1,274