Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Income Statement [Abstract]
Total revenues	$ 11,931	$ 10,796
Cost of revenues	6,634	5,386
Gross profit	5,297	5,410
Operating expenses:
Research and development	1,359	1,281
Sales and marketing	2,429	2,071
General and administrative	1,357	1,655
Total operating expenses	5,145	5,007
Income from operations	152	403
Other expense, net	11	7
Income from operations before provision for income taxes	141	396
Provision for income taxes	40	150
Net income	$ 101	$ 246
Net income per share:
Basic	$ 0.01	$ 0.02
Diluted	$ 0.01	$ 0.02
Weighted average shares used in computing net income per common share:
Basic	10,034	9,868
Diluted	10,140	10,108