Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Income Statement [Abstract]
Total revenues	$ 9,021	$ 10,595
Cost of revenues	5,105	6,338
Gross profit	3,916	4,257
Operating expenses:
Research and development	719	958
Sales and marketing	3,152	4,091
General and administrative	1,698	2,244
Total operating expenses	5,569	7,293
Loss from operations	(1,653)	(3,036)
Other income (expense), net	9	(6)
Loss from operations before provision for income taxes	(1,644)	(3,042)
Provision for income taxes	7	6
Net loss	$ (1,651)	$ (3,048)
Net loss per share:
Basic	$ (0.12)	$ (0.22)
Diluted	$ (0.12)	$ (0.22)
Weighted average shares used in computing net loss per common share:
Basic	13,786	13,630
Diluted	13,786	13,630