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Accrued expenses and other current liabilities (Tables)
12 Months Ended
Dec. 31, 2013
Accrued Expenses and Other Current Liabilities

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

 

     December 31,  
     2012      2013  

Salary and related expenses

   $ 10,074       $ 12,193   

Research and clinical trial costs

     5,995         1,311   

Accrued interest

     4,533         2,082   

Construction in progress

     3,878         342   

Other

     1,297         5,706   
  

 

 

    

 

 

 

Accrued expenses and other current liabilities

   $ 25,777       $ 21,634