Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Tables)

v2.4.0.6
Marketable Securities (Tables)
9 Months Ended
Jan. 31, 2012
Marketable Securities [Abstract]  
Summary Of Marketable Securities
Schedule Of Amortized Cost And Fair Values Of Marketable Securities Classified As Available-For-Sale Investments
Summary Of Financial Assets Measured At Fair Value
Summary Of Assets Measured At Fair Value On Recurring Basis Using Significant Unobservable Inputs
     Three Months Ended
January 31,
     Nine Months Ended
January 31,
 

Auction Rate Securities

   2012      2011      2012      2011  
     (in thousands)  

Balance, beginning of period

   $ —         $ —         $ —         $ 8,200   

Auction rate securities put option

     —           —           —           (745

Realized gain included in operations

     —           —           —           745   

Sale of securities

     —           —           —           (8,200
  

 

 

    

 

 

    

 

 

    

 

 

 

Balance, end of period

   $ —         $ —         $ —         $ —