Condensed Consolidated Statements Of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue	$ 68,436	$ 57,714	$ 128,497	$ 109,184
Cost of revenue	31,337	26,786	59,301	50,871
Gross profit	37,099	30,928	69,196	58,313
Operating expenses:
Research and development	13,368	12,478	28,971	24,601
Selling, general and administrative	16,853	13,793	32,962	27,051
Litigation expense (benefit), net	274	(257)	(8,426)	(558)
Total operating expenses	30,495	26,014	53,507	51,094
Income from operations	6,604	4,914	15,689	7,219
Interest and other income, net	295	218	485	208
Income before income taxes	6,899	5,132	16,174	7,427
Income tax provision (benefit)	502	(357)	759	(562)
Net income	$ 6,397	$ 5,489	$ 15,415	$ 7,989
Net income per share:
Basic (in Dollars per share)	$ 0.17	$ 0.15	$ 0.40	$ 0.22
Diluted (in Dollars per share)	$ 0.16	$ 0.14	$ 0.39	$ 0.21
Weighted-average shares outstanding:
Basic (in Shares)	38,684	37,053	38,577	36,657
Diluted (in Shares)	39,608	38,239	39,563	38,019
Cash dividends declared per common share (in Dollars per share)	$ 0.15		$ 0.15