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. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Earnings Per Share [Abstract]
Weighted-average number of shares outstanding during period	13,436	13,756	13,408	14,217
Common stock equivalents from incremental shares under equity-based compensation plans	482	697	443	654
Number of shares on which diluted earnings per share is based	13,918	14,453	13,851	14,871
Net income	$ 943	$ 940	$ 1,575	$ 1,354
Net income per share, basic	$ 0.07	$ 0.07	$ 0.12	$ 0.10
Net income per share, diluted	$ 0.07	$ 0.07	$ 0.11	$ 0.09