Net Loss Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (4,918)	$ (2,580)	$ (9,086)	$ (10,300)
Net income (loss) from discontinued operations, net of taxes	40	(238)	317	(373)
Net loss	$ (4,878)	$ (2,818)	$ (8,769)	$ (10,673)
Weighted-average shares – basic	26,032	25,141	25,907	24,970
Effect of dilutive potential common shares	0	0	0	0
Weighted-average shares – diluted	26,032	25,141	25,907	24,970
Basic And Diluted Earnings Per Share [Abstract]
Basic – continuing operations	$ (0.19)	$ (0.1)	$ (0.35)	$ (0.41)
Diluted – continuing operations	(0.19)	(0.1)	(0.35)	(0.41)
Basic – discontinued operations	0	(0.01)	0.01	(0.01)
Diluted – discontinued operations	0	(0.01)	0.01	(0.01)
Basic – net loss	(0.19)	(0.11)	(0.34)	(0.43)
Diluted – net loss	$ (0.19)	$ (0.11)	$ (0.34)	$ (0.43)