Net Income Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Weighted-average number of shares outstanding during period	13,756	15,142	14,217	15,219
Common stock equivalents from incremental shares under equity-based compensation plans	697	337	654	235
Number of shares on which diluted earnings per share is based	14,453	15,479	14,871	15,454
Net Income	$ 940	$ 434	$ 1,354	$ 1,185
Net income per share, basic	$ 0.07	$ 0.03	$ 0.10	$ 0.08
Net income per share, diluted	$ 0.07	$ 0.03	$ 0.09	$ 0.08