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Animal Health License Agreements (Termination Obligation Narrative) (Details) (USD $)
 3 Months Ended 1 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Nov. 30, 2011
Termination Obligation [Member]
Mar. 31, 2013
Termination Obligation [Member]
Dec. 31, 2012
Termination Obligation [Member]
Debt Instrument [Line Items]          
Notes payable $ 2,692,159 $ 3,053,424 $ 1,374,000 $ 200,509 $ 397,588
Initial payment on note payable     150,000    
Number of payments on notes payable     6    
Periodic payments, principal and interest     204,000    
Net amount 1,221,195 1,210,698 810,000    
Original amortization period 197 months   152 months    
Gain on elimination of deferred revenue and net accounts payable     938,896    
Deferred revenue $ 1,182,000   $ 900,000