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
	Jul. 02, 2021	Jun. 26, 2020	Jul. 02, 2021	Jun. 26, 2020
Earnings Per Share [Abstract]
Weighted-average number of shares outstanding during period	13,845	13,605	13,770	13,576
Common stock equivalents from incremental shares under equity-based compensation plans	1,127	677	1,188	723
Number of shares on which diluted earnings per share is based	14,972	14,282	14,958	14,299
Net income	$ 1,833	$ 1,759	$ 3,341	$ 2,903
Net income per share, basic	$ 0.13	$ 0.13	$ 0.24	$ 0.21
Net income per share, diluted	$ 0.12	$ 0.12	$ 0.22	$ 0.20