Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Income Statement [Abstract]
Total revenues	$ 10,595	$ 9,509
Cost of revenues	6,338	5,587
Gross profit	4,257	3,922
Operating expenses:
Research and development	958	1,104
Sales and marketing	4,091	4,050
General and administrative	2,244	2,385
Total operating expenses	7,293	7,539
Loss from operations	(3,036)	(3,617)
Other (expense) income, net	(6)	18
Loss from operations before provision for income taxes	(3,042)	(3,599)
Provision for income taxes	6	4
Net loss	$ (3,048)	$ (3,603)
Net loss per share:
Basic	$ (0.22)	$ (0.31)
Diluted	$ (0.22)	$ (0.31)
Weighted average shares used in computing net loss per common share:
Basic	13,630	11,628
Diluted	13,630	11,628