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Accrued Expenses and Other Current Liabilities
6 Months Ended
Jun. 30, 2016
Payables and Accruals [Abstract]  
Accrued Expenses and Other Current Liabilities
Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consist of the following (in thousands):

 
June 30, 2016
 
December 31, 2015
Clinical trial costs
$
3,208

 
$
3,294

Professional fees
560

 
435

Compensation and related benefits
935

 
1,535

Interest expense

 
28

Accrued expenses and other current liabilities
$
4,703

 
$
5,292