Intangible Assets (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 18,677,590	$ 17,838,255
Accumulated Amortization	9,610,616	8,833,992
Net Book Value	9,066,974	9,004,263
Patents And Copyrights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,103,590	17,284,255
Accumulated Amortization	9,055,672	8,279,992
Net Book Value	9,047,918	9,004,263
Prepaid Licensing Fees [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	574,000	554,000
Accumulated Amortization	554,944	554,000
Net Book Value	$ 19,056	$ 0