Computation of Basic and Diluted Net Loss Per Common Share - Reconciliation of Numerator and Denominator of Basic and Diluted Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Numerator:
Net loss	$ (2,391)	$ (2,010)
Denominator:
Weighted average shares of common stock (basic)	15,881	14,346
Weighted average shares of common stock (diluted)	15,881	14,346
Per share data:
Basic net loss per share	$ (0.15)	$ (0.14)
Diluted net loss per share	$ (0.15)	$ (0.14)