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Accrued Expenses
 12 Months Ended
Dec. 31, 2018
Accrued Expenses  
Accrued Expenses

7. Accrued Expenses

Accrued expenses are comprised of the following, in thousands of dollars:

 

 

 

 

 

 

 

 

 

 

December 31, 

 

December 31, 

 

    

2018

    

2017

Accrued clinical trial and clinical supply costs     

 

$

14,034

 

$

6,996

Accrued compensation

 

 

13,546

 

 

10,279

Accrued professional fees

 

 

3,706

 

 

2,890

Accrued interest expense

 

 

650

 

 

 —

Accrued product costs

 

 

38

 

 

726

Other accrued expenses

 

 

4,561

 

 

6,414

 

 

$

36,535

 

$

27,305