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Accounts Payable (Tables)
12 Months Ended
Dec. 31, 2015
Text Block [Abstract]  
Summary of Accounts Payable

Accounts payable at December 31 are summarized below:

 

     2015      2014  

External services

   $ 1,995,302       $ 1,352,710   

Supplies

     476,544         339,762   

Other

     40,199         126,359   
  

 

 

    

 

 

 

Total accounts payable

   $ 2,512,045       $ 1,818,831