Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Income Statement [Abstract]
Total revenues	$ 9,789	$ 9,815	$ 33,628	$ 29,644
Cost of revenues	5,544	4,974	18,352	15,176
Gross profit	4,245	4,841	15,276	14,468
Operating expenses:
Research and development	1,256	1,237	4,007	4,000
Sales and marketing	2,378	2,234	7,212	6,463
General and administrative	1,858	1,227	5,546	4,206
Total operating expenses	5,492	4,698	16,765	14,669
(Loss) income from operations	(1,247)	143	(1,489)	(201)
Other (expense) income, net	(51)	164	(83)	134
(Loss) income from operations before benefit from income taxes	(1,298)	307	(1,572)	(67)
Benefit from income taxes	(627)	(135)	(674)	(103)
Net (loss) income	$ (671)	$ 442	$ (898)	$ 36
Net (loss) income per share:
Basic	$ (0.07)	$ 0.04	$ (0.09)	$ 0.00
Diluted	$ (0.07)	$ 0.04	$ (0.09)	$ 0.00
Weighted average shares used in computing net (loss) income per common share:
Basic	10,129	9,972	10,083	9,956
Diluted	10,129	10,094	10,083	10,142