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Note G - Fair Value Measurements (Tables)
9 Months Ended
Jan. 31, 2018
Notes Tables  
Fair Value, by Balance Sheet Grouping [Table Text Block]
    January 31, 2018   April 30, 2017
(In thousands)   Carrying
Value
  Fair
Value
  Carrying
Value
  Fair
Value
Cash   $
534
    $
534
    $
434
    $
434
 
Finance receivables, net    
380,384
     
306,056
     
357,161
     
287,115
 
Accounts payable    
14,071
     
14,071
     
11,224
     
11,224
 
Revolving credit facilities and notes payable    
148,172
     
148,172
     
117,944
     
117,944