Note 6 - Exploratory Extension Well Costs - Exploratory Well Costs (Details) $ in Thousands	3 Months Ended
Mar. 31, 2026 USD ($)
Beginning capitalized exploratory/extension well costs	$ 16,117
Additions to exploratory/extension well costs	21,681
Reclassification to proved properties	(14,622)
Exploratory/extension well costs charged to exploration and abandonment expense	(83)
Ending capitalized exploratory/extension well costs	$ 23,093

Amount of addition to capitalized exploratory well cost pending determination of proved reserve in oil- and gas-producing activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

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- Definition

Amount of expense for capitalized exploratory well costs for which proved reserves were not found at the exploratory well.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

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- Definition

The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

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- Definition

Amount of reclassification of capitalized exploratory well cost to well, facility, and equipment based on determination of proved reserve in oil- and gas-producing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

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