Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Operations [Abstract]
Net sales	$ 28,222,443	$ 21,198,055	$ 53,863,835	$ 44,315,004
Cost of products sold	11,720,070	8,956,362	22,120,203	19,865,649
Gross margin	16,502,373	12,241,693	31,743,632	24,449,355
Sales, general and administrative expenses	8,404,611	9,065,847	17,258,633	18,401,230
Research and development expenses	2,038,830	2,793,235	4,171,050	5,545,699
Litigation judgment expense		3,301,243	(2,200,000)	3,301,243
Loss on impairment		1,350,504		1,350,504
Loss on write down / disposal of property and equipment, net		747,409	178,175	757,038
Income (loss) from operations	6,058,932	(5,016,545)	12,513,949	(4,906,359)
Interest and other income, net	7,133	1,261,885	14,127	1,288,206
Income (loss) before provision for income taxes	6,066,065	(3,754,660)	12,528,076	(3,618,153)
Provision (benefit) for income taxes	2,623,818	(1,459,828)	5,282,011	(1,343,053)
Net income (loss)	3,442,247	(2,294,832)	7,246,065	(2,275,100)
Income (loss) per common and common equivalent shares
Basic	$ 0.06	$ (0.04)	$ 0.12	$ (0.04)
Diluted	$ 0.06	$ (0.04)	$ 0.12	$ (0.04)
Weighted average number of common and common equivalent shares outstanding
Basic	54,520,889	60,605,140	58,849,010	61,515,979
Diluted	55,166,644	60,605,140	59,482,674	61,515,979
Net income (loss)	3,442,247	(2,294,832)	7,246,065	(2,275,100)
Foreign currency translation adjustments	(20,429)	1,994	(20,547)	22,092
Comprehensive income (loss)	$ 3,421,818	$ (2,292,838)	$ 7,225,518	$ (2,253,008)