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Note G - Fair Value Measurements (Tables)
9 Months Ended
Jan. 31, 2019
Notes Tables  
Fair Value, by Balance Sheet Grouping [Table Text Block]
    January 31, 2019   April 30, 2018
(In thousands)   Carrying
Value
  Fair
Value
  Carrying
Value
  Fair
Value
                 
Cash   $
1,624
    $
1,624
    $
1,022
    $
1,022
 
Finance receivables, net    
414,913
     
333,879
     
383,617
     
308,384
 
Accounts payable    
13,603
     
13,603
     
13,609
     
13,609
 
Debt facilities    
170,737
     
170,737
     
152,367
     
152,367