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Note 5 - Derivative Instruments (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Derivative Instruments [Table Text Block]
  

(Liability) Asset

 
  

March 31, 2024

  

December 31, 2023

 
  

Contract Quantity

  

Fair Value

  

Contract Quantity

  

Fair Value

 

Regulated fixed price future commitments, included in other current assets (in thousand barrels)

  232  $(538)  354  $1,736