Net Loss Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (2,173)	$ (1,624)	$ (8,137)	$ (10,710)
Net income from discontinued operations, net of taxes	0	48	1,095	365
Net loss	$ (2,173)	$ (1,576)	$ (7,042)	$ (10,345)
Weighted-average shares – basic	26,895	26,287	26,695	26,033
Effect of dilutive potential common shares	0	0	0	0
Weighted-average shares – diluted	26,895	26,287	26,695	26,033
Basic And Diluted Earnings Per Share [Abstract]
Basic – continuing operations	$ (0.08)	$ (0.06)	$ (0.3)	$ (0.41)
Diluted – continuing operations	(0.08)	(0.06)	(0.3)	(0.41)
Basic – discontinued operations	0	0	0.04	0.01
Diluted – discontinued operations	0	0	0.04	0.01
Basic – net loss	(0.08)	(0.06)	(0.26)	(0.4)
Diluted – net loss	$ (0.08)	$ (0.06)	$ (0.26)	$ (0.4)