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Animal Health License Agreements (Schedule of Revenue Recognition Associated with the License Agreement) (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Animal Health License Agreements [Abstract]    
License fees and milestone amounts received / achieved $ 1,716,000  
Third party obligations recorded, including WU (337,060)  
Deferred revenue balance 1,182,000  
Revenue amortization (18,655)   
Net deferred revenue balance $ 1,339,714  
Original amortization period 197 months