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Note 1 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]

 

 

Years

 

Tractors

 

 

5

 

 

Trailers

 

 

7

 

 

Refrigerated containers

   

12

   

Service and other equipment

 

3

-

15

 

Buildings and improvements

 

20

-

40