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]		318,643
Stock plan transactions and other		(373)	$ 3	[1]		(376)
Stock-based compensation expense		3,410				3,410
Net income (loss)		(4,289)					(4,289)
Ending balance (in shares) at Sep. 27, 2022	[1]		48,443,794
Ending balance at Sep. 27, 2022		36,381	$ 484	[1]	$ (35,000)	210,260	(139,363)
Treasury stock, ending balance (in shares) at Sep. 27, 2022					2,423,871
Beginning balance (in shares) at Jun. 28, 2022	[1]		48,384,193
Beginning balance at Jun. 28, 2022		34,887	$ 484	[1]	$ (35,000)	209,561	(140,158)
Treasury stock, beginning balance (in shares) at Jun. 28, 2022					2,423,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan transactions and other (in shares)	[1]		59,601
Stock plan transactions and other		(56)	$ 0	[1]		(56)
Stock-based compensation expense		755				755
Net income (loss)		795					795
Ending balance (in shares) at Sep. 27, 2022	[1]		48,443,794
Ending balance at Sep. 27, 2022		$ 36,381	$ 484	[1]	$ (35,000)	210,260	(139,363)
Treasury stock, ending balance (in shares) at Sep. 27, 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]		620,534
Stock plan transactions and other		$ (644)	$ 6	[1]		(650)
Shares repurchased and retired (in shares)	[1]		(1,731,952)
Shares repurchased and retired		(5,014)	$ (17)	[1]		(4,997)
Stock-based compensation expense		3,528				3,528
Net income (loss)		$ (3,719)					(3,719)
Ending balance (in shares) at Oct. 03, 2023		44,929,009	47,352,880	[1]
Ending balance at Oct. 03, 2023		$ 32,515	$ 474	[1]	$ (35,000)	209,148	(142,107)
Treasury stock, ending balance (in shares) at Oct. 03, 2023		2,423,871			2,423,871
Beginning balance (in shares) at Jul. 04, 2023	[1]		48,853,045
Beginning balance at Jul. 04, 2023		$ 36,080	$ 489	[1]	$ (35,000)	213,398	(142,807)
Treasury stock, beginning balance (in shares) at Jul. 04, 2023					2,423,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan transactions and other (in shares)	[1]		231,787
Stock plan transactions and other		$ 41	$ 2	[1]		39
Shares repurchased and retired (in shares)		(1,731,952)	(1,731,952)	[1]
Shares repurchased and retired		$ (5,014)	$ (17)	[1]		(4,997)
Stock-based compensation expense		708				708
Net income (loss)		$ 700					700
Ending balance (in shares) at Oct. 03, 2023		44,929,009	47,352,880	[1]
Ending balance at Oct. 03, 2023		$ 32,515	$ 474	[1]	$ (35,000)	$ 209,148	$ (142,107)
Treasury stock, ending balance (in shares) at Oct. 03, 2023		2,423,871			2,423,871

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