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	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Numerator:
Net income	$ 474	$ 10,038	$ 2,231
Denominator:
Weighted average shares of common stock (basic)	9,962	9,892	9,245
Effect of dilutive preferred shares			448
Effect of dilutive stock options	154	291	291
Effect of dilutive contingent shares	12	174	120
Weighted average shares of common stock (diluted)	10,128	10,357	10,104
Per share data:
Basic net income per share	$ 0.05	$ 1.01	$ 0.24
Diluted net income per share	$ 0.05	$ 0.97	$ 0.22