Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statements of Operations:
Revenue	$ 46,074	$ 37,313
Cost of revenue	17,050	14,034
Gross profit	29,024	23,279
Operating expenses
Marketing and sales	6,417	5,263
Research and development	3,456	2,628
General and administrative	4,703	3,994
Total operating expenses	14,576	11,885
Income from operations	14,448	11,394
Other income, net	103	3
Income before income taxes	14,551	11,397
Provision for income taxes	4,449	3,110
Net income	10,102	8,287
Net income per share:
Basic (in Dollars per share)	$ 0.40	$ 0.33
Diluted (in Dollars per share)	$ 0.39	$ 0.32
Shares used to compute net income per share:
Basic (in Shares)	25,573,851	25,014,907
Diluted (in Shares)	26,091,069	25,645,744
Comprehensive Income (net of tax)
Comprehensive income	$ 10,274	$ 7,380