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Cash, Cash Equivalents and Marketable Securities
12 Months Ended
Jul. 31, 2013
Cash and Cash Equivalents [Abstract]  
Cash, Cash Equivalents and Marketable Securities
(3)
  Cash, Cash Equivalents and Marketable Securities
 
As of July 31, 2013, cash and cash equivalents include the following (in thousands):

     Cost   Unrealized
Gains
   Unrealized
Losses
Less Than
12 Months
   Unrealized
Losses
12 Months
or Longer
   Estimated
Fair Value
Cash
              $ 47,675          $           $           $           $ 47,675   
Money market funds
                 15,956                                                    15,956   
Total
              $ 63,631          $           $           $           $ 63,631   
 
As of July 31, 2012, cash and cash equivalents include the following (in thousands):

     Cost   Unrealized
Gains
   Unrealized
Losses
Less Than
12 Months
   Unrealized
Losses
12 Months
or Longer
   Estimated
Fair Value
Cash
              $ 96,779          $           $           $           $ 96,779   
Money market funds
                 43,333                                                    43,333   
Total
              $ 140,112          $           $           $           $ 140,112   
 
The Company invests its excess cash in money market funds and U.S. Treasury Bills. The Company’s cash and cash equivalents are placed with high credit quality financial institutions.