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Cash Flow
6 Months Ended
Oct. 31, 2011
Cash Flow [Abstract]  
Cash Flow
NOTE I--CASH FLOW

Supplemental disclosures of cash flow information:
   
Six Months Ended
 
   
October 31
 
(in thousands)
 
2011
   
2010
 
Cash paid during the period for:
           
Interest
  $ 185     $ 181  
Income taxes
  $ 160     $ 204