Net Income Per Share (Schedule of Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Numerator:
Net income	$ 5,983	$ 839	$ 1,810	$ 13,682
Denominator:
Weighted average common shares - basic	29,617	31,246	29,608	31,365
Potentially dilutive common share equivalent	453	866	471	1,153
Weighted average common shares - dilutive	30,070	32,112	30,079	32,518
Basic net income per share	$ 0.20	$ 0.03	$ 0.06	$ 0.44
Diluted net income per share	$ 0.20	$ 0.03	$ 0.06	$ 0.42
Anti-dilutive employee stock-based awards, excluded	2,245	1,208	2,425	692