Net Loss Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (2,580)	$ (6,124)	$ (10,300)	$ (11,692)
Net loss from discontinued operations, net of tax	(238)	(2)	(373)	(938)
Net loss	$ (2,818)	$ (6,126)	$ (10,673)	$ (12,630)
Weighted-average shares – basic	25,141	24,241	24,970	24,137
Effect of dilutive potential common shares	0	0	0	0
Weighted-average shares – diluted	25,141	24,241	24,970	24,137
Basic and diluted net loss per share:
Basic – continuing operations	$ (0.1)	$ (0.25)	$ (0.41)	$ (0.48)
Diluted – continuing operations	(0.1)	(0.25)	(0.41)	(0.48)
Basic – discontinued operations	(0.01)	0	(0.01)	(0.04)
Diluted – discontinued operations	(0.01)	0	(0.01)	(0.04)
Basic – net loss	(0.11)	(0.25)	(0.43)	(0.52)
Diluted – net loss	$ (0.11)	$ (0.25)	$ (0.43)	$ (0.52)