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Accounts Payable and Accrued Expenses
6 Months Ended
Jun. 30, 2015
Accounts Payable and Accrued Expenses [Abstract]  
Accounts Payable and Accrued Expenses
7.  Accounts Payable and Accrued Expenses

The carrying value of our accounts payable and accrued expenses approximates fair value, as it represents amounts due to vendors and employees which will be satisfied within one year. Accounts payable and accrued expenses at the below dates consisted of the following:

  
June 30, 2015
  
December 31, 2014
Legal and professional fees
 
$
3,165
  
$
1,063
Accrued consulting and clinical trial costs
  
1,718
   
2,662
Accrued payroll and related costs
  
1,099
   
1,722
Accounts payable and other
  
534
   
1,123
Total
 
$
6,516
  
$
6,570