Intangible Assets (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Summary of intangible assets
Weighted Average Amortization Period (years)	4 years 1 month 6 days	4 years 4 months 24 days
Cost	$ 2,355,419	$ 2,355,419
Accumulated Amortization	1,381,042	1,275,853
Net Book Value	974,377	1,079,566
Licensing Agreements [Member]
Summary of intangible assets
Weighted Average Amortization Period (years)	8 years 2 months 12 days	8 years 8 months 12 days
Cost	462,234	462,234
Accumulated Amortization	238,288	224,708
Net Book Value	223,946	237,526
Patents [Member]
Summary of intangible assets
Weighted Average Amortization Period (years)	3 years 1 month 6 days	3 years 3 months 18 days
Cost	1,893,185	1,893,185
Accumulated Amortization	1,142,754	1,051,145
Net Book Value	$ 750,431	$ 842,040