Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Income Statement [Abstract]
Total revenues	$ 9,815	$ 10,118	$ 29,644	$ 31,036
Cost of revenues	4,974	4,969	15,176	15,532
Gross profit	4,841	5,149	14,468	15,504
Operating expenses:
Research and development	1,237	1,096	4,000	3,596
Sales and marketing	2,234	1,980	6,463	5,784
General and administrative	1,227	1,467	4,206	4,521
Total operating expenses	4,698	4,543	14,669	13,901
Income (loss) from operations	143	606	(201)	1,603
Other income (expense), net	164	(112)	134	(300)
Income (loss) from operations before (benefit from) provision for income taxes	307	494	(67)	1,303
(Benefit from) provision for income taxes	(135)	4	(103)	29
Net income	$ 442	$ 490	$ 36	$ 1,274
Net income per share:
Basic	$ 0.04	$ 0.05	$ 0.00	$ 0.13
Diluted	$ 0.04	$ 0.05	$ 0.00	$ 0.12
Weighted average shares used in computing net income per common share:
Basic	9,972	9,869	9,956	9,918
Diluted	10,094	10,255	10,142	10,397