Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Income Statement [Abstract]
Total revenues	$ 11,908	$ 9,033	$ 23,839	$ 19,829
Cost of revenues	6,174	4,816	12,808	10,202
Gross profit	5,734	4,217	11,031	9,627
Operating expenses:
Research and development	1,392	1,482	2,751	2,763
Sales and marketing	2,405	2,158	4,834	4,229
General and administrative	2,331	1,324	3,688	2,979
Total operating expenses	6,128	4,964	11,273	9,971
Loss from operations	(394)	(747)	(242)	(344)
Other expense, net	21	23	32	30
Loss from operations before (benefit from) provision for income taxes	(415)	(770)	(274)	(374)
(Benefit from) provision for income taxes	(87)	(118)	(47)	32
Net loss	$ (328)	$ (652)	$ (227)	$ (406)
Net loss per share:
Basic	$ (0.03)	$ (0.07)	$ (0.02)	$ (0.04)
Diluted	$ (0.03)	$ (0.07)	$ (0.02)	$ (0.04)
Weighted average shares used in computing net loss per common share:
Basic	10,085	10,027	10,060	9,948
Diluted	10,085	10,027	10,060	9,948