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Note 6 - Segment Information (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

Truck

Segment

   

All Other

   

Totals

 
                         

As of and for the three months ended March 31, 2023

                       

Revenues from external customers

  $ 1,907,941     $ 3,826     $ 1,911,767  

Segment operating income

    127,563       213       127,776  

Segment income before taxes

    118,927       213       119,140  

Segment assets

    3,913,928       55,624       3,969,552  
                         

As of and for the three months ended March 31, 2022

                       

Revenues from external customers

  $ 1,559,051     $ 4,151     $ 1,563,202  

Segment operating income

    107,320       179       107,499  

Segment income before taxes

    120,259       85       120,344  

Segment assets

    3,266,895       54,653       3,321,548