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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation Expense

Total stock-based compensation expense was recognized in our Condensed Consolidated Statements of Operations as follows (in thousands):

 

     Three months ended
June 30,		      Six months ended
June 30,		  
     2015      2014      2015      2014  

Cost of goods sold

    $ 239       $ 280       $ 563       $ 599   

Research and development expense

      2,125         1,832         4,547         3,805   

General and administrative expense

      2,196         2,052         4,627         4,121   
  

 

 

     

 

 

     

 

 

     

 

 

  

Total stock-based compensation

    $ 4,560       $ 4,164       $ 9,737       $ 8,525