Short-Term and Long-Term Investments (Tables)
6 Months Ended
Jun. 30, 2014
Investments Schedule [Abstract]  
Summary of Marketable Securities

The following is a summary of marketable securities (included in short and long-term marketable securities in the Condensed Consolidated Balance Sheets) as of June 30, 2014 and December 31, 2013 (in thousands):

 

     Amortized
Cost
     Gross Unrealized
Gains
     Gross Unrealized
Losses
    Fair Value  

June 30, 2014

          

Certificates of deposit

   $ 9,923       $ 1       $ (11   $ 9,913   

U.S. government agency notes

     19,819         4         —          19,823   
  

 

 

    

 

 

    

 

 

   

 

 

 

Total

   $ 29,742       $ 5       $ (11   $ 29,736   
  

 

 

    

 

 

    

 

 

   

 

 

 

December 31, 2013

          

Certificates of deposit

   $ 1,784       $ —        $ (1   $ 1,783   

U.S. government agency notes

     23,987         3         (2     23,988   
  

 

 

    

 

 

    

 

 

   

 

 

 

Total

   $ 25,771       $ 3       $ (3   $ 25,771