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Note 10 - Financial Instruments - Effect of Derivative Instruments on Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain on derivative instruments, net  
Derivative, Gain (Loss) on Derivative, Net $ 0 $ 414
Natural Gas Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]    
Derivative, Gain (Loss) on Derivative, Net 0 235
Crude Oil Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]    
Derivative, Gain (Loss) on Derivative, Net $ 0 $ 179