Unaudited Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 29, 2020	$ 293,788		$ 71,722	$ 222,066
Beginning Balance (in shares) at Dec. 29, 2020		22,318
Exercise of stock options	3,610	$ 5,192	(1,582)
Exercise of stock options (in shares)		94
Issuance of common stock, net	28,957	$ 28,957
Issuance of common stock, net (in shares)		704
Issuance of restricted stock units	(451)	$ 4,915	(5,366)
Issuance of restricted stock units (in shares)		103
Repurchase, retirement and reclassification of common stock		$ (39,064)		39,064
Stock-based compensation	2,515		2,515
Adjustment to dividends previously accrued	5			5
Net income (loss)	(3,141)			(3,141)
Ending Balance at Mar. 30, 2021	325,283		67,289	257,994
Ending Balance (in shares) at Mar. 30, 2021		23,219
Beginning Balance at Dec. 28, 2021	333,771		72,513	261,258
Beginning Balance (in shares) at Dec. 28, 2021		23,304
Issuance of restricted stock units	(360)	$ 5,615	(5,975)
Issuance of restricted stock units (in shares)		112
Repurchase, retirement and reclassification of common stock		$ (5,615)		5,615
Stock-based compensation	2,788		2,788
Adjustment to dividends previously accrued	3			3
Net income (loss)	1,460			1,460
Ending Balance at Mar. 29, 2022	$ 337,662		$ 69,326	$ 268,336
Ending Balance (in shares) at Mar. 29, 2022		23,416