Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Numerator:
Net loss	$ (1,767)	$ (2,165)	$ (6,399)	$ (2,782)
Denominator:
Weighted average shares of common stock (basic)	15,986	15,824	15,921	15,272
Weighted average shares of common stock (diluted)	15,986	15,824	15,921	15,272
Per share data:
Basic net loss per share	$ (0.11)	$ (0.14)	$ (0.40)	$ (0.18)
Diluted net loss per share	$ (0.11)	$ (0.14)	$ (0.40)	$ (0.18)
Restricted Stock Units (RSUs)
Denominator:
Dilutive Effect of Share-Based Payment Arrangements	0	0	0	0
Stock Options
Denominator:
Dilutive Effect of Share-Based Payment Arrangements	0	0	0	0