Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue	$ 84,512	$ 73,538
Cost of revenue	39,002	33,855
Gross profit	45,510	39,683
Operating expenses:
Research and development	17,321	16,038
Selling, general and administrative	17,768	17,518
Litigation expense	45	270
Total operating expenses	35,134	33,826
Income from operations	10,376	5,857
Interest and other income, net	543	642
Income before income taxes	10,919	6,499
Income tax provision	344	536
Net income	$ 10,575	$ 5,963
Net income per share:
Basic (in dollars per share)	$ 0.26	$ 0.15
Diluted (in dollars per share)	$ 0.25	$ 0.15
Weighted-average shares outstanding:
Basic (in shares)	40,028	39,105
Diluted (in shares)	41,646	40,596
Cash dividends declared per common share (in dollars per share)	$ 0.20	$ 0.20