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Note B - Summary of Significant Accounting Policies (Tables)
9 Months Ended
Jan. 31, 2019
Notes Tables  
Property, Plant, and Equipment Useful Life [Table Text Block]
Furniture, fixtures and equipment
3 to 7 years
Leasehold improvements
5 to 15 years
Buildings and improvements
18 to 39 years
Revenue from External Customers by Products and Services [Table Text Block]
    Three Months Ended
January 31,
  Nine Months Ended
January 31,
(In thousands)   2019   2018   2019   2018
                 
Sales – used autos   $
119,955
    $
109,480
    $
371,465
    $
332,515
 
Wholesales – third party    
6,460
     
6,405
     
19,205
     
17,857
 
Service contract sales    
7,600
     
7,095
     
22,655
     
21,211
 
Payment protection plan revenue    
5,788
     
5,186
     
16,990
     
15,284
 
                                 
Total   $
139,803
    $
128,166
    $
430,315
    $
386,867