Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Income Statement [Abstract]
Total revenues	$ 13,426	$ 6,219	$ 25,385	$ 15,240
Cost of revenues	7,318	3,813	14,338	8,918
Gross profit	6,108	2,406	11,047	6,322
Operating expenses:
Research and development	1,672	807	2,837	1,526
Sales and marketing	3,646	2,693	6,628	5,845
General and administrative	1,928	1,690	4,561	3,388
Total operating expenses	7,246	5,190	14,026	10,759
Loss from operations	(1,138)	(2,784)	(2,979)	(4,437)
Other income, net	2,539	9	2,378	18
Income (loss) from operations before provision for income taxes	1,401	(2,775)	(601)	(4,419)
Provision for income taxes	8	5	16	12
Net income (loss)	$ 1,393	$ (2,780)	$ (617)	$ (4,431)
Net income (loss) per share:
Basic	$ 0.09	$ (0.20)	$ (0.04)	$ (0.32)
Diluted	$ 0.09	$ (0.20)	$ (0.04)	$ (0.32)
Weighted average shares used in computing net income (loss) per common share:
Basic	15,647	13,792	14,996	13,789
Diluted	16,307	13,792	14,996	13,789