Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
Income Statement [Abstract]
Total revenues	$ 11,959	$ 9,021
Cost of revenues	7,020	5,105
Gross profit	4,939	3,916
Operating expenses:
Research and development	1,165	719
Sales and marketing	2,982	3,152
General and administrative	2,633	1,698
Total operating expenses	6,780	5,569
Loss from operations	(1,841)	(1,653)
Other income, net	(161)	9
Loss from operations before provision for income taxes	(2,002)	(1,644)
Provision for income taxes	8	7
Net loss	$ (2,010)	$ (1,651)
Net loss per share:
Basic	$ (0.14)	$ (0.12)
Diluted	$ (0.14)	$ (0.12)
Weighted average shares used in computing net loss per common share:
Basic	14,346	13,786
Diluted	14,346	13,786