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Note 5 - Oil and Gas Leases - Oil and Gas Leasing Activities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Royalty interests	$ 415,469	$ 417,846
Lease fees	0	0
Oil and Gas, Result of Operation, Revenue	415,469	417,846
Production costs	(36,228)	(46,436)
Results before income tax expense	379,241	371,410
Estimated income tax expense	(97,086)	(95,081)
Results of operations from producing activities excluding corporate overhead	$ 282,155	$ 276,329

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