CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue:
Product revenue	$ 30,889	$ 20,299	$ 78,302	$ 55,165
Development, service and licensing revenue	124	365	330	687
Total revenue	31,013	20,664	78,632	55,852
Cost of revenue:
Cost of product revenue	14,574	9,988	37,408	26,889
Cost of development, service and licensing revenue	64	60	159	156
Total cost of revenue	14,638	10,048	37,567	27,045
Gross profit	16,375	10,616	41,065	28,807
Operating expenses:
Research and development	6,622	4,304	17,782	12,488
Sales and marketing	5,584	3,772	15,902	10,151
General and administrative	3,356	1,938	8,214	5,089
Total operating expenses	15,562	10,014	41,898	27,728
Income (loss) from operations	813	602	(833)	1,079
Interest income (expense) and other income (expense), net
Interest expense	(345)	(297)	(1,322)	(742)
Interest income and other income (expense), net	383	(263)	477	(177)
Total interest income (expense) and other income (expense), net	38	(560)	(845)	(919)
Income (loss) before tax expense	851	42	(1,678)	160
Income tax expense	(43)	(29)	(98)	(78)
Net income (loss)	808	13	(1,776)	82
Less: Accretion of preferred stock	(608)	(2,826)	(6,258)	(8,476)
Net income (loss) attributable to common stockholders — basic and diluted	$ 200	$ (2,813)	$ (8,034)	$ (8,394)
Net income (loss) per share attributable to common stockholders — basic and diluted	$ 0.01	$ (0.72)	$ (1.01)	$ (2.20)
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders:
Basic	15,318	3,904	7,991	3,813
Diluted	16,859	3,904	7,991	3,813