CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Product revenue	$ 25,862	$ 18,871	$ 47,413	$ 34,866
Development, service and licensing revenue	126	252	206	322
Total revenue	25,988	19,123	47,619	35,188
Cost of revenue:
Cost of product revenue	12,339	8,901	22,834	16,901
Cost of development, service and licensing revenue	57	59	95	96
Total cost of revenue	12,396	8,960	22,929	16,997
Gross profit	13,592	10,163	24,690	18,191
Operating expenses:
Research and development	5,726	4,023	11,160	8,184
Sales and marketing	5,288	3,333	10,318	6,379
General and administrative	2,356	1,597	4,858	3,151
Total operating expenses	13,370	8,953	26,336	17,714
Income (loss) from operations	222	1,210	(1,646)	477
Interest expense and other income (expense), net
Interest expense	(490)	(230)	(977)	(445)
Other income (expense), net	54	24	94	86
Total interest expense and other income (expense), net	(436)	(206)	(883)	(359)
Income (loss) before tax expense	(214)	1,004	(2,529)	118
Income tax expense	(40)	(30)	(55)	(49)
Net income (loss)	(254)	974	(2,584)	69
Less: Accretion of preferred stock	(2,825)	(2,825)	(5,650)	(5,650)
Net loss attributable to common stockholders—basic and diluted	$ (3,079)	$ (1,851)	$ (8,234)	$ (5,581)
Net loss per share attributable to common stockholders—basic and diluted	$ (0.71)	$ (0.48)	$ (1.92)	$ (1.48)
Weighted—average shares used to compute net loss per share attributable to common stockholders—basic and diluted	4,321	3,845	4,294	3,766