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Accrued Expenses and Other Current Liabilities (Tables)
12 Months Ended
Dec. 31, 2015
Payables and Accruals [Abstract]  
Schedule of Accrued Expenses and Other Current Liabilities
Accrued expenses and other current liabilities consist of the following (in thousands):

 
December 31,
 
2015
 
2014
Clinical development expense
$
3,294

 
$
6,967

Compensation and related benefits
1,535

 
1,040

Professional fees
435

 
821

Interest expense
28

 
57

Accrued expenses and other current liabilities
$
5,292

 
$
8,885