Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 844,452	$ 627,921	$ 582,382
Cost of revenue	378,498	281,596	259,714
Gross profit	465,954	346,325	322,668
Operating expenses:
Research and development	137,598	107,757	93,455
Selling, general and administrative	161,670	133,542	113,803
Litigation expense	7,804	2,464	1,922
Total operating expenses	307,072	243,763	209,180
Income from operations	158,882	102,562	113,488
Other income, net	10,460	10,558	4,994
Income before income taxes	169,342	113,120	118,482
Income tax expense	4,967	4,281	13,214
Net income	$ 164,375	$ 108,839	$ 105,268
Net income per share
Basic (in dollars per share)	$ 3.67	$ 2.52	$ 2.49
Diluted (in dollars per share)	$ 3.50	$ 2.38	$ 2.36
Weighted-average shares outstanding:
Basic (in shares)	44,840	43,165	42,247
Diluted (in shares)	47,014	45,763	44,602