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Short-Term Investments (Tables)
9 Months Ended
Sep. 30, 2013
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, 2013        December 31, 2012   
    Amortized        Gross unrealized              Amortized        Gross unrealized         
    cost basis        gain(loss)        Fair value        cost basis        gain(loss)        Fair value   

Corporate notes, bonds and paper

  $ -          $ -          $ -          $ 9,091      $ (7   $ 9,084   

Government securities/money market

    7,200        (4     7,196        4,245        (1     4,244   
 

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

Total

  $ 7,200      $ (4   $ 7,196      $ 13,336      $ (8   $ 13,328