Computation of Basic and Diluted Net Income Per Common Share - Reconciliation of Numerator and Denominator of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Numerator:
Net income	$ 101	$ 246
Denominator:
Weighted average shares of common stock (basic)	10,034	9,868
Effect of dilutive stock options	86	221
Effect of dilutive contingent shares	20	19
Weighted average shares of common stock (diluted)	10,140	10,108
Per share data:
Basic income per share	$ 0.01	$ 0.02
Diluted income per share	$ 0.01	$ 0.02