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Marketable Securities (Tables)
 12 Months Ended
Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]  
Schedule of Marketable Securities

As of December 31, 2015, the Company maintained no marketable securities. Marketable securities as of December 31, 2014 consisted of the following, all of which were classified as available-for-sale:

 

     Amortized
Cost		      Unrealized
Gains		      Unrealized
Losses		      Fair
Value		  
     (in thousands)  

December 31, 2014:

            

Commercial paper

    $ 6,493       $ —         $ (2 )     $ 6,491   

Corporate debt securities

      81,921         —           (72 )       81,849   
  

 

 

     

 

 

     

 

 

     

 

 

  

Total

    $ 88,414       $ —         $ (74 )     $ 88,340