Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue:
Product	$ 81,978	$ 62,175
Services	4,915	5,346
Total revenue	86,893	67,521
Cost of revenue:
Product	46,797	40,263
Services	5,382	3,842
Total cost of revenue	52,179	44,105
Gross profit	34,714	23,416
Operating expenses:
Research and development	9,895	8,636
Sales and marketing	7,049	5,960
General and administrative	7,057	6,042
Restructuring charges		282
Total operating expenses	24,001	20,920
Income from operations	10,713	2,496
Other (expense) income:
Interest income	69	54
Interest expense	(1,111)	(1,047)
Other, net	(154)	(59)
Total other expense	(1,196)	(1,052)
Income before income taxes	9,517	1,444
Income tax provision (benefit)	11	(504)
Net income	$ 9,506	$ 1,948
Net income per share:
Basic (in dollars per share)	$ 0.32	$ 0.07
Diluted (in dollars per share)	$ 0.29	$ 0.06
Shares used in computing net income per share:
Basic weighted average common shares	29,772	29,038
Diluted weighted average common shares	32,255	30,520