Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock		Treasury	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 28, 2021	[1]		48,125,151
Beginning balance at Dec. 28, 2021		$ 37,633	$ 481	[1]	$ (35,000)	$ 207,226	$ (135,074)
Treasury stock, beginning balance (in shares) at Dec. 28, 2021					2,423,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan transactions and other (in shares)	[1]		259,042
Stock plan transactions and other		(317)	$ 3	[1]		(320)
Stock-based compensation expense		2,655				2,655
Net income (loss)		(5,084)					(5,084)
Ending balance (in shares) at Jun. 28, 2022	[1]		48,384,193
Ending balance at Jun. 28, 2022		34,887	$ 484	[1]	$ (35,000)	209,561	(140,158)
Treasury stock, ending balance (in shares) at Jun. 28, 2022					2,423,871
Beginning balance (in shares) at Mar. 29, 2022	[1]		48,258,594
Beginning balance at Mar. 29, 2022		32,045	$ 483	[1]	$ (35,000)	208,065	(141,503)
Treasury stock, beginning balance (in shares) at Mar. 29, 2022					2,423,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan transactions and other (in shares)	[1]		125,599
Stock plan transactions and other		(18)	$ 1	[1]		(19)
Stock-based compensation expense		1,515				1,515
Net income (loss)		1,345					1,345
Ending balance (in shares) at Jun. 28, 2022	[1]		48,384,193
Ending balance at Jun. 28, 2022		$ 34,887	$ 484	[1]	$ (35,000)	209,561	(140,158)
Treasury stock, ending balance (in shares) at Jun. 28, 2022					2,423,871
Beginning balance (in shares) at Jan. 03, 2023		46,040,427	48,464,298	[1]
Beginning balance at Jan. 03, 2023		$ 38,364	$ 485	[1]	$ (35,000)	211,267	(138,388)
Treasury stock, beginning balance (in shares) at Jan. 03, 2023		2,423,871			2,423,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan transactions and other (in shares)	[1]		388,747
Stock plan transactions and other		$ (685)	$ 4	[1]		(689)
Stock-based compensation expense		2,820				2,820
Net income (loss)		$ (4,419)					(4,419)
Ending balance (in shares) at Jul. 04, 2023		46,429,174	48,853,045	[1]
Ending balance at Jul. 04, 2023		$ 36,080	$ 489	[1]	$ (35,000)	213,398	(142,807)
Treasury stock, ending balance (in shares) at Jul. 04, 2023		2,423,871			2,423,871
Beginning balance (in shares) at Apr. 04, 2023	[1]		48,781,701
Beginning balance at Apr. 04, 2023		$ 35,931	$ 488	[1]	$ (35,000)	211,946	(141,503)
Treasury stock, beginning balance (in shares) at Apr. 04, 2023					2,423,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan transactions and other (in shares)	[1]		71,344
Stock plan transactions and other		(44)	$ 1	[1]		(45)
Stock-based compensation expense		1,497				1,497
Net income (loss)		$ (1,304)					(1,304)
Ending balance (in shares) at Jul. 04, 2023		46,429,174	48,853,045	[1]
Ending balance at Jul. 04, 2023		$ 36,080	$ 489	[1]	$ (35,000)	$ 213,398	$ (142,807)
Treasury stock, ending balance (in shares) at Jul. 04, 2023		2,423,871			2,423,871

[1] Unless otherwise noted, activity relates to Class A common stock.