Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Derivatives and Fair Value - Gain Loss on Derivative Instruments (Details)

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Note 8 - Derivatives and Fair Value - Gain Loss on Derivative Instruments (Details) - Crude Oil Swaps [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Derivative instruments loss, net $ 21 $ (31,758)
Cash Settlements Paid on Matured Derivative Contracts, Net [Member]    
Derivative instruments loss, net (59) (12,500)
Unrealized Gain (Loss) [Member]    
Derivative instruments loss, net $ 80 $ (19,258)