Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue	$ 106,456	$ 91,194	$ 285,047	$ 246,148
Cost of revenue	48,531	41,754	130,686	112,896
Gross profit	57,925	49,440	154,361	133,252
Operating expenses:
Research and development	20,472	17,272	55,669	49,053
Selling, general and administrative	22,397	18,722	61,696	54,204
Litigation expense, net	55	136	92	717
Total operating expenses	42,924	36,130	117,457	103,974
Income from operations	15,001	13,310	36,904	29,278
Interest and other income (expense), net	780	(6)	1,920	871
Income before income taxes	15,781	13,304	38,824	30,149
Income tax provision	1,408	2,103	2,678	5,086
Net income	$ 14,373	$ 11,201	$ 36,146	$ 25,063
Net income per share:
Basic (in dollars per share)	$ 0.35	$ 0.28	$ 0.90	$ 0.64
Diluted (in dollars per share)	$ 0.34	$ 0.28	$ 0.87	$ 0.62
Weighted-average shares outstanding:
Basic (in shares)	40,590	39,592	40,335	39,422
Diluted (in shares)	41,895	40,689	41,752	40,676
Cash dividends declared per common share (in dollars per share)	$ 0.20	$ 0.20	$ 0.60	$ 0.60