Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Schedule of Changes in Standardized Measure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Standardized measure, beginning of year	$ 143,788	$ 19,167
Sales of oil and natural gas, net of production costs	(14,398)	(24,302)
Net changes in prices and production costs	(66,494)	52,053
Changes in estimated future development costs	(4,834)	(2,860)
Extensions and discoveries	0	0
Purchases of minerals in place	0	116,673
Sale of minerals in place	(16,055)	(1,606)
Revisions in previous quantity estimates	(22,724)	12,662
Previously estimated development costs incurred	215	0
Net changes in income taxes	25,874	(27,021)
Accretion of discount	14,759	10,170
Changes in timing and other	151	(11,148)
Standardized measure, end of year	$ 60,282	$ 143,788