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Note G - Fair Value Measurements (Tables)
12 Months Ended
Apr. 30, 2018
Notes Tables  
Fair Value, by Balance Sheet Grouping [Table Text Block]
    April 30, 2018   April 30, 2017
(In thousands)   Carrying
Value
  Fair
Value
  Carrying
Value
  Fair
Value
                 
Cash   $
1,022
    $
1,022
    $
434
    $
434
 
Finance receivables, net    
383,617
     
308,384
     
357,161
     
287,115
 
Accounts payable    
13,609
     
13,609
     
11,224
     
11,224
 
Debt facilities    
152,367
     
152,367
     
117,944
     
117,944