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Note K - Supplemental Cash Flow Information (Tables)
 9 Months Ended
Jan. 31, 2020
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
    Nine Months Ended
January 31,
(in thousands)   2020   2019
Supplemental disclosures:                
Interest paid   $
6,566
     $
5,191
  
Income taxes paid, net    
8,652
      
7,050
  
                 
Non-cash transactions:                
Inventory acquired in repossession and payment protection plan claims    
38,325
      
37,406
  
Net settlement option exercises    
1,224
      
2,359