Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
Product	$ 96,539	$ 58,859	$ 178,517	$ 121,034
Services	6,251	5,592	11,166	10,938
Total revenue	102,790	64,451	189,683	131,972
Cost of revenue:
Product	57,689	34,638	104,486	74,902
Services	6,039	4,682	11,421	8,523
Total cost of revenue	63,728	39,320	115,907	83,425
Gross profit	39,062	25,131	73,776	48,547
Operating expenses:
Research and development	11,256	8,478	21,151	17,114
Sales and marketing	7,485	5,790	14,534	11,750
General and administrative	7,791	6,232	14,848	12,274
Restructuring charges				282
Total operating expenses	26,532	20,500	50,533	41,420
Income from operations	12,530	4,631	23,243	7,127
Other (expense) income:
Interest income	111	54	180	108
Interest expense	(1,336)	(1,338)	(2,447)	(2,385)
Other, net	16	(238)	(138)	(297)
Total other expense	(1,209)	(1,522)	(2,405)	(2,574)
Income before income taxes	11,321	3,109	20,838	4,553
Income tax (benefit) provision	(2,611)	172	(2,600)	(332)
Net income	$ 13,932	$ 2,937	$ 23,438	$ 4,885
Net income per share:
Basic (in dollars per share)	$ 0.46	$ 0.10	$ 0.78	$ 0.17
Diluted (in dollars per share)	$ 0.42	$ 0.10	$ 0.72	$ 0.16
Shares used in computing net income per share:
Basic weighted average common shares	30,589	29,097	30,183	29,066
Diluted weighted average common shares	33,168	30,701	32,779	30,607