Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Revenue	$ 91,477	$ 122,185
Cost of revenue:
Cost of revenue	53,971	75,029
Gross profit	37,506	47,156
Operating expenses:
Research and development	13,685	12,233
Sales and marketing	8,918	8,411
General and administrative	7,807	8,010
Total operating expenses	30,410	28,654
Income from operations	7,096	18,502
Other (expense) income:
Interest income	841	410
Interest expense	(1,230)	(1,337)
Other, net	(173)	(102)
Total other expense	(562)	(1,029)
Income before income taxes	6,534	17,473
Income tax provision	472	3,558
Net income	$ 6,062	$ 13,915
Net income per share:
Basic (in dollars per share)	$ 0.19	$ 0.43
Diluted (in dollars per share)	$ 0.18	$ 0.41
Shares used in computing net income per share:
Basic weighted average common shares	32,683	32,094
Diluted weighted average common shares	34,224	34,123
Product
Revenue:
Revenue	$ 84,197	$ 116,022
Cost of revenue:
Cost of revenue	47,338	68,374
Services
Revenue:
Revenue	7,280	6,163
Cost of revenue:
Cost of revenue	$ 6,633	$ 6,655