Computation of Basic and Diluted Net Loss Per Common Share - Reconciliation of Numerator and Denominator of Basic and Diluted Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Numerator:
Net loss	$ (328)	$ (652)	$ (227)	$ (406)
Denominator:
Weighted average shares of common stock (basic)	10,085	10,027	10,060	9,948
Weighted average shares of common stock (diluted)	10,085	10,027	10,060	9,948
Per share data:
Basic net loss per share	$ (0.03)	$ (0.07)	$ (0.02)	$ (0.04)
Diluted net loss per share	$ (0.03)	$ (0.07)	$ (0.02)	$ (0.04)