Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed Consolidated Statements of Operations and Comprehensive Income [Abstract]
Net sales	$ 30,433,652	$ 25,641,392
Cost of products sold and services delivered	11,982,648	10,400,133
Gross margin	18,451,004	15,241,259
Sales, general and administrative expenses	11,210,900	8,854,022
Research and development expenses	2,012,556	2,132,220
Litigation judgment recovery		(2,200,000)
Gain on write down / disposal of property and equipment, net	(28,960)
Income from operations	5,256,508	6,455,017
Interest and other (expense) income, net	(22,761)	6,994
Income before provision for income taxes	5,233,747	6,462,011
Provision for income taxes	1,935,926	2,658,193
Net income	3,297,821	3,803,818
Income per common and common equivalent shares
Basic	$ 0.06	$ 0.07
Diluted	$ 0.06	$ 0.07
Weighted average number of common and common equivalent shares outstanding
Basic	52,746,178	55,700,395
Diluted	54,599,980	56,358,066
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	3,297,821	3,803,818
Foreign currency translation adjustments	(18,236)	(118)
Comprehensive income	$ 3,279,585	$ 3,803,700