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Note 5 - Oil and Gas Leases - Oil and Gas Leasing Activities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Gross revenues
Royalty interests	$ 596,755	$ 364,907
Lease fees	0	0
Results of Operations, Revenue from Oil and Gas Producing Activities, Total	596,755	364,907
Production costs	(50,312)	(41,685)
Results before income tax expense	546,443	323,222
Estimated income tax expense	(140,155)	(93,734)
Results of operations from producing activities excluding corporate overhead	$ 406,288	$ 229,488

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Amount of royalty interest from oil and gas producing activities.

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The amount of expenses related to oil and gas producing activities.

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Income before income taxes for oil and gas producing activities.

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Income tax expense for oil and gas producing activities.

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