Accounts Payable and Accrued Expenses (Tables)
 6 Months Ended
Jun. 30, 2012
Accounts Payable and Accrued Liabilities [Abstract]  
Schedule of accounts payable and accrued expenses
                 
    June 30, 2012     December 31, 2011  

Research and development expenses

   $ 1,351,940     $ 1,316,095  

Professional fees

     761,061       715,672  

General and administrative expenses

     107,848       99,746  

Compensation related expenses

     76,193       78,716  
   

 

 

    

 

 

  
     
    $ 2,297,042     $ 2,210,229