Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements of Operations [Abstract]
Net sales	$ 21,198,055	$ 19,120,525	$ 44,315,004	$ 42,964,426
Total cost of products sold	8,956,362	9,489,815	19,865,649	19,843,295
Gross margin	12,241,693	9,630,710	24,449,355	23,121,131
Sales, general and administrative expenses	9,065,847	9,988,885	18,401,230	20,276,107
Research and development expenses	2,793,235	3,055,049	5,545,699	7,194,965
Litigation judgment expense	3,301,243		3,301,243
Loss on impairment	1,350,504		1,350,504
Loss on write down / disposal of property and equipment, net	747,409	22,510	757,038	34,442
Loss from operations	(5,016,545)	(3,435,734)	(4,906,359)	(4,384,383)
Interest and other income, net	1,261,885	6,203	1,288,206	14,102
Loss before income tax benefit	(3,754,660)	(3,429,531)	(3,618,153)	(4,370,281)
Income tax benefit	(1,459,828)	(2,070,142)	(1,343,053)	(2,518,287)
Net loss	$ (2,294,832)	$ (1,359,389)	$ (2,275,100)	$ (1,851,994)
Loss per common and common equivalent shares
Basic	$ (0.04)	$ (0.02)	$ (0.04)	$ (0.03)
Diluted	$ (0.04)	$ (0.02)	$ (0.04)	$ (0.03)
Weighted average number of common and common equivalent shares outstanding
Basic	60,605,140	62,333,929	61,515,979	62,450,722
Diluted	60,605,140	62,333,929	61,515,979	62,450,722