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. 29, 2020	[1]		46,807,587
Beginning balance at Dec. 29, 2020		$ 29,699	$ 468	[1]	$ (35,000)	$ 202,970	$ (138,739)
Treasury stock, beginning balance (in shares) at Dec. 29, 2020					2,423,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan transactions and other (in shares)	[1]		228,716
Stock plan transactions and other		(279)	$ 2	[1]		(281)
Stock-based compensation expense		2,317				2,317
L Catterton warrants exercised (in shares)	[1]		975,458
L Catterton warrants exercised		0	$ 10	[1]		(10)
Net income (loss)		3,706					3,706
Ending balance (in shares) at Jun. 29, 2021	[1]		48,011,761
Ending balance at Jun. 29, 2021		35,443	$ 480	[1]	$ (35,000)	204,996	(135,033)
Treasury stock, ending balance (in shares) at Jun. 29, 2021					2,423,871
Beginning balance (in shares) at Mar. 30, 2021	[1]		47,890,488
Beginning balance at Mar. 30, 2021		28,125	$ 479	[1]	$ (35,000)	203,362	(140,716)
Treasury stock, beginning balance (in shares) at Mar. 30, 2021					2,423,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan transactions and other (in shares)	[1]		121,273
Stock plan transactions and other		56	$ 1	[1]		55
Stock-based compensation expense		1,579				1,579
Net income (loss)		5,683					5,683
Ending balance (in shares) at Jun. 29, 2021	[1]		48,011,761
Ending balance at Jun. 29, 2021		$ 35,443	$ 480	[1]	$ (35,000)	204,996	(135,033)
Treasury stock, ending balance (in shares) at Jun. 29, 2021					2,423,871
Beginning balance (in shares) at Dec. 28, 2021		45,701,280	48,125,151	[1]
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			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		45,960,322	48,384,193	[1]
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			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		45,960,322	48,384,193	[1]
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			2,423,871

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