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Valuation and Qualifying Accounts
12 Months Ended
Apr. 30, 2012
Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts Valuation and Qualifying Accounts

Schedule II – Valuation and Qualifying Accounts

Years Ended April 30, 2012, 2011, and 2010

(in thousands)

 

         

Allowance for Doubtful Accounts:

       

Balance April 30, 2009

  $ 259   

Bad debt provision

    163   

Doubtful accounts written off (net)

    (163)  
   

 

 

 

 

Balance April 30, 2010

    259   

Bad debt provision

    60   

Doubtful accounts written off (net)

    (69)  
   

 

 

 

 

Balance April 30, 2011

    250   

Bad debt provision

    214   

Doubtful accounts written off (net)

         (153)  
   

 

 

 

 

Balance April 30, 2012

  $ 311   
   

 

 

 

 

         
   

All other schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange Commission are not required under the related instructions or are inapplicable and, therefore, have been omitted.