Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements of Operations [Abstract]
Net sales	$ 24,383,110	$ 21,084,081	$ 68,698,115	$ 64,048,507
Total cost of products sold	11,279,502	10,668,399	31,145,151	30,519,891
Gross margin	13,103,608	10,415,682	37,552,964	33,528,616
Sales, general and administrative expenses	9,477,548	9,416,372	27,887,357	29,718,724
Research and development expenses	2,362,721	1,686,062	7,908,420	8,881,027
Litigation judgment accrual			3,300,000
Loss on impairment	3,353		1,353,857
Loss on write down / disposal of property and equipment, net	47,894	37,981	826,170	83,179
Income (loss) from operations	1,212,092	(724,733)	(3,694,266)	(5,109,116)
Interest and other income, net	15,265	10,364	1,303,470	24,466
Income (loss) before provision (benefit) for income taxes	1,227,357	(714,369)	(2,390,796)	(5,084,650)
Provision (benefit) for income taxes	91,072	1,621,109	(1,251,981)	(897,178)
Net income (loss)	$ 1,136,285	$ (2,335,478)	$ (1,138,815)	$ (4,187,472)
Income (loss) per common and common equivalent shares
Basic	$ 0.02	$ (0.04)	$ (0.02)	$ (0.07)
Diluted	$ 0.02	$ (0.04)	$ (0.02)	$ (0.07)
Weighted average number of common and common equivalent shares outstanding
Basic	58,787,274	62,342,775	60,617,787	62,495,957
Diluted	60,037,328	62,342,775	60,617,787	62,495,957