Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Consolidated Statements of Operations and Comprehensive Income [Abstract]
Net sales	$ 28,772,956	$ 24,383,110	$ 82,636,791	$ 68,698,115
Cost of products sold, and services delivered	11,969,944	11,279,502	34,090,148	31,145,151
Gross margin	16,803,012	13,103,608	48,546,643	37,552,964
Sales, general and administrative expenses	9,539,996	9,477,548	26,798,629	27,887,357
Research and development expenses	1,985,701	2,362,721	6,156,751	7,908,420
Litigation judgment (recovery) expense			(2,200,000)	3,301,243
Loss on impairment		3,353		1,353,857
Loss on write down / disposal of property and equipment, net	0	47,894	305,138	796,353
Income (loss) from operations	5,277,315	1,212,092	17,791,263	(3,694,266)
Interest and other income, net	11,418	15,265	25,545	1,303,470
Income (loss) before provision for income taxes	5,288,733	1,227,357	17,816,808	(2,390,796)
Provision (benefit) for income taxes	1,611,861	91,072	6,893,872	(1,251,981)
Net income (loss)	3,676,872	1,136,285	10,922,936	(1,138,815)
Income (loss) per common and common equivalent shares
Basic	$ 0.07	$ 0.02	$ 0.19	$ (0.02)
Diluted	$ 0.07	$ 0.02	$ 0.19	$ (0.02)
Weighted average number of common and common equivalent shares outstanding
Basic	52,509,068	58,787,274	57,997,341	60,617,787
Diluted	53,106,325	60,037,328	58,482,833	60,617,787
Net income (loss)	3,676,872	1,136,285	10,922,936	(1,138,815)
Foreign currency translation adjustments	25,863	(49,438)	5,316	(27,346)
Comprehensive income (loss)	$ 3,702,735	$ 1,086,847	$ 10,928,252	$ (1,166,161)