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Note 10 - Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Commodity Contracts $ 414 $ (12,039)
Unrealized Loss Gain On Derivative Instruments Net [Member] | Natural Gas Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]    
Commodity Contracts 0 892
Unrealized Loss Gain On Derivative Instruments Net [Member] | Crude Oil Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]    
Commodity Contracts 0 3,713
Realized Loss On Derivative Instruments Net [Member] | Natural Gas Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]    
Commodity Contracts 235 (4,543)
Realized Loss Gain On Derivative Instruments Net [Member] | Crude Oil Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]    
Commodity Contracts $ 179 $ (12,101)