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Accrued Expenses (Detail) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Schedule of Accrued Liabilities [Line Items]    
Accrued licensor transition costs $ 10,751,011  
Accrued clinical cost 1,298,145  
Accrued compensation 975,607 308,936
Accrued legal fees 91,104 149,055
Other 15,834 41,551
Totals $ 13,131,701 $ 499,542