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Note 1 - Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]

Asset Class

 

Estimated Asset Life
(in years)

 
      

Service vehicles

 3-5 

Office furniture and equipment

 3-7 

Revenue equipment

 3-8 

Structures and improvements

 5-40