Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Income Statement [Abstract]
Total revenues	$ 41,757	$ 42,814	$ 38,273
Cost of revenues	21,804	21,409	19,686
Gross profit	19,953	21,405	18,587
Operating expenses:
Research and development	5,214	4,629	3,684
Sales and marketing	8,901	8,155	7,720
General and administrative	5,550	6,034	5,023
Proceeds from demutualization of insurance carrier			(473)
Total operating expenses	19,665	18,818	15,954
Income from operations	288	2,587	2,633
Other income (expense), net	3	(1,255)	(371)
Income before (benefit from) provision for income taxes	291	1,332	2,262
(Benefit from) provision for income taxes	(183)	(8,706)	31
Net income	$ 474	$ 10,038	$ 2,231
Net income per share:
Basic	$ 0.05	$ 1.01	$ 0.24
Diluted	$ 0.05	$ 0.97	$ 0.22
Weighted average shares used in computing net income per common share:
Basic	9,962	9,892	9,245
Diluted	10,128	10,357	10,104