Note 6 - Exploratory Extension Well Costs - Exploratory Well Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Beginning capitalized exploratory/extension well costs	$ 40,888	$ 186,427	$ 28,076
Additions to exploratory/extension well costs	162,190	527,502	655,294
Reclassification to proved properties	(169,230)	(673,041)	(496,943)
Exploratory/extension well costs charged to exploration and abandonment expense	(229)	0	0
Ending capitalized exploratory/extension well costs	$ 33,619	$ 40,888	$ 186,427