Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock Including Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2018		$ 83,826	$ 180,356	$ (7,357)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised		97
Stock awards vested		(1)
Stock repurchased related to the exercise of stock options		(1,901)
Stock-based compensation		1,464
Net Income	$ 7,472
Other Comprehensive Income, Net of Tax	86			86
Ending Balance at Mar. 30, 2019	263,778	83,485	187,564	(7,271)
Beginning Balance at Dec. 31, 2019	292,800	88,515	212,553	(8,268)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Employee Stock Purchase Plan		1,112
Stock options exercised		39
Stock awards vested		(1)
Stock repurchased related to the exercise of stock options		(2,008)
Stock-based compensation		2,279
Net Income	7,930
Other Comprehensive Income, Net of Tax	276			276
Ending Balance at Mar. 28, 2020	$ 302,427	$ 89,936	$ 220,483	$ (7,992)