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Note B - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Apr. 30, 2017
Notes Tables  
Property, Plant, and Equipment Useful Life [Table Text Block]
Furniture, fixtures and equipment (in years)  
3
to
7
Leasehold improvements (in years)  
5
to
15
Buildings and improvements (in years)  
18
to
39
Revenue from External Customers by Products and Services [Table Text Block]
    Years Ended April 30,
(In thousands)   2017   2016   2015
             
Sales – used autos   $
448,183
    $
436,080
    $
416,060
 
Wholesales – third party    
23,554
     
24,917
     
19,961
 
Service contract sales    
28,668
     
27,323
     
19,758
 
Payment protection plan revenue    
19,744
     
18,197
     
16,790
 
                         
Total   $
520,149
    $
506,517
    $
472,569