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Note 10 - Revenue (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   
Three Months
Ended
June 30, 2018
   
Six Months
Ended
June 30, 2018
 
Commercial vehicle sales revenue
  $
857,025
    $
1,630,125
 
Parts revenue
   
237,068
     
460,422
 
Commercial vehicle repair service revenue
   
185,872
     
362,813
 
Finance revenue
   
2,863
     
5,199
 
Insurance revenue
   
2,629
     
5,034
 
Other revenue
   
4,381
     
9,502
 
Total
  $
1,289,838
    $
2,473,095