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Accrued Expenses and Other Current Liabilities (Tables)
12 Months Ended
Dec. 31, 2014
Text Block [Abstract]  
Summary of Accrued Expenses

Accrued expenses at December 31 are summarized below:

 

     2014      2013  

External services

   $ 2,152,770       $ 1,191,048   

Employee compensation

     2,415,826         2,655,242   

Other

     301,114         221,626   
  

 

 

    

 

 

 

Total accrued expenses and other current liabilities

$ 4,869,710    $ 4,067,916