Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Income Statement [Abstract]
Total revenues	$ 13,264	$ 8,803	$ 38,649	$ 24,043
Cost of revenues	7,482	5,149	21,820	14,067
Gross profit	5,782	3,654	16,829	9,976
Operating expenses:
Research and development	1,788	869	4,625	2,395
Sales and marketing	3,914	2,959	10,542	8,804
General and administrative	2,237	1,672	6,798	5,060
Total operating expenses	7,939	5,500	21,965	16,259
Loss from operations	(2,157)	(1,846)	(5,136)	(6,283)
Other income, net		135	2,378	153
Loss from operations before provision for income taxes	(2,157)	(1,711)	(2,758)	(6,130)
Provision for income taxes	8	8	24	20
Net loss	$ (2,165)	$ (1,719)	$ (2,782)	$ (6,150)
Net loss per share:
Basic	$ (0.14)	$ (0.12)	$ (0.18)	$ (0.44)
Diluted	$ (0.14)	$ (0.12)	$ (0.18)	$ (0.44)
Weighted average shares used in computing net loss per common share:
Basic	15,824	13,893	15,272	13,824
Diluted	15,824	13,893	15,272	13,824