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Note 5 - Inventories (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
December 31,
 
   
2016
   
2015
 
                 
New commercial vehicles
  $
575,879
    $
770,861
 
Used commercial vehicles
   
71,429
     
86,960
 
Parts and accessories
   
187,419
     
201,868
 
Other
   
15,564
     
15,341
 
Less allowance
   
(9,987
)    
(13,832
)
                 
Total
  $
840,304
    $
1,061,198