Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Income Statement [Abstract]
Total revenues	$ 10,483	$ 11,931
Cost of revenues	6,018	6,634
Gross profit	4,465	5,297
Operating expenses:
Research and development	1,496	1,359
Sales and marketing	2,923	2,429
General and administrative	1,904	1,357
Total operating expenses	6,323	5,145
(Loss) income from operations	(1,858)	152
Other expense, net	(2)	(11)
(Loss) income from operations before provision for income taxes	(1,860)	141
Provision for income taxes	6	40
Net (loss) income	$ (1,866)	$ 101
Net (loss) income per share:
Basic	$ (0.16)	$ 0.01
Diluted	$ (0.16)	$ 0.01
Weighted average shares used in computing net (loss) income per common share:
Basic	11,518	10,034
Diluted	11,518	10,140