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Note 10 - Fair Value (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Fair Value, by Balance Sheet Grouping [Table Text Block]
  

September 30, 2024

  

December 31, 2023

 
  

Carrying

  

Estimated

  

Carrying

  

Estimated

 
  

value

  

fair value

  

value

  

fair value

 

Non-qualified employee benefit plan investments

 $11  $11  $15  $15 

Long-term debt (including current portion)

  (1,859)  (1,805)  (1,688)  (1,613)