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Note 6 - Oil and Gas Leases - Oil and Gas Leasing Activities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Gross revenues
Royalty interests	$ 257,247	$ 500,426
Lease fees	5,882	22,901
Gross Revenue	263,129	523,327
Production costs	29,379	57,454
Results before income tax expense	233,750	465,873
Estimated income tax expense	67,788	135,103
Results of operations from producing activities excluding corporate overhead	$ 165,962	$ 330,770

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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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