Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue	$ 100,362	$ 84,512
Cost of revenue	45,520	39,002
Gross profit	54,842	45,510
Operating expenses:
Research and development	18,894	17,321
Selling, general and administrative	22,092	17,768
Litigation expense	286	45
Total operating expenses	41,272	35,134
Income from operations	13,570	10,376
Interest and other income, net	1,381	543
Income before income taxes	14,951	10,919
Income tax provision	474	344
Net income	$ 14,477	$ 10,575
Net income per share:
Basic (in dollars per share)	$ 0.35	$ 0.26
Diluted (in dollars per share)	$ 0.33	$ 0.25
Weighted-average shares outstanding:
Basic (in shares)	41,047	40,028
Diluted (in shares)	43,268	41,646
Cash dividends declared per common share (in dollars per share)	$ 0.20	$ 0.20