Note 5 - Oil and Gas Leases - Oil and Gas Leasing Activities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Royalty interests	$ 417,846	$ 380,654
Lease fees	0	0
Oil and Gas, Result of Operation, Revenue	417,846	380,654
Production costs	(46,436)	(41,677)
Results before income tax expense	371,410	338,977
Estimated income tax expense	(95,081)	(86,917)
Results of operations from producing activities excluding corporate overhead	$ 276,329	$ 252,060