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Accrued Expenses and Other Current Liabilities (Tables)
 6 Months Ended
Jun. 30, 2012
Accrued expenses and other current liabilities [Abstract]  
Accrued expenses and other current liabilities
                 
    June 30,
2012		     December 31,
2011		  

Salary and related expenses

   $ 6,791     $ 8,997  

Research and clinical trial costs

     7,087       2,383  

Accrued interest

     2,461       8,262  

Construction in progress

     2,100       —    

Warrant liability

     4,922       —    

Accrued litigation settlement liability

     24,547       —    

Other

     1,716       1,094  
   

 

 

    

 

 

  

Accrued expenses and other current liabilities

   $ 49,624     $ 20,736