XML 39 R31.htm IDEA: XBRL DOCUMENT v3.20.1
Note 1 - Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2019
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