Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue	$ 91,194	$ 78,335	$ 246,148	$ 206,832
Cost of revenue	41,754	35,872	112,896	95,173
Gross profit	49,440	42,463	133,252	111,659
Operating expenses:
Research and development	17,272	14,679	49,053	43,649
Selling, general and administrative	18,722	17,006	54,204	49,968
Litigation expense (benefit), net	136	332	717	(8,093)
Total operating expenses	36,130	32,017	103,974	85,524
Income from operations	13,310	10,446	29,278	26,135
Interest and other income (expense), net	(6)	202	871	686
Income before income taxes	13,304	10,648	30,149	26,821
Income tax provision (benefit)	2,103	(573)	5,086	186
Net income	$ 11,201	$ 11,221	$ 25,063	$ 26,635
Net income per share:
Basic (in Dollars per share)	$ 0.28	$ 0.29	$ 0.64	$ 0.69
Diluted (in Dollars per share)	$ 0.28	$ 0.28	$ 0.62	$ 0.67
Weighted-average shares outstanding:
Basic (in Shares)	39,592	38,785	39,422	38,646
Diluted (in Shares)	40,689	39,727	40,676	39,618
Cash dividends declared per common share (in Dollars per share)	$ 0.20	$ 0.15	$ 0.60	$ 0.30