Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue	$ 122,185	$ 86,893
Cost of revenue:
Cost of revenue	75,029	52,179
Gross profit	47,156	34,714
Operating expenses:
Research and development	12,233	9,895
Sales and marketing	8,411	7,049
General and administrative	8,010	7,057
Total operating expenses	28,654	24,001
Income from operations	18,502	10,713
Other (expense) income:
Interest income	410	69
Interest expense	(1,337)	(1,111)
Other, net	(102)	(154)
Total other expense	(1,029)	(1,196)
Income before income taxes	17,473	9,517
Income tax provision	3,558	11
Net income	$ 13,915	$ 9,506
Net income per share:
Basic (in dollars per share)	$ 0.43	$ 0.32
Diluted (in dollars per share)	$ 0.41	$ 0.29
Shares used in computing net income per share:
Basic weighted average common shares	32,094	29,772
Diluted weighted average common shares	34,123	32,255
Product
Revenue	$ 116,022	$ 81,978
Cost of revenue:
Cost of revenue	68,374	46,797
Services
Revenue	6,163	4,915
Cost of revenue:
Cost of revenue	$ 6,655	$ 5,382