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Short-Term Investments (Tables)
9 Months Ended
Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]  
Available-for-Sale Securities Recorded at Fair Value with Unrealized Gains or Losses

Available-for-sale securities with contractual maturities of less than 12 months were as follows (in thousands):

 

     September 30, 2016      December 31, 2015  
                                          
     Amortized
cost basis
     Gross unrealized
gain(loss)
     Fair value      Amortized
cost basis
     Gross unrealized
gain(loss)
    Fair value  

Government securities/money market

   $ 1       $ —         $ 1       $ 4,080       $ (2     4,078   
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

   

 

 

 

Total

   $ 1       $ —         $ 1       $ 4,080       $ (2   $ 4,078