Note 5 - Income Taxes - Reconciliation of Computed Income Tax (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Computed Federal Tax Provision	$ 1,059,585	$ 251,036
Increase (Decrease) in Tax from:
Allowable Depletion in Excess of Basis	(76,317)	(148,538)
Federal Tax Carrybacks		(118,534)
PY Provision Adjustments	109,438
Dividend Received Deduction	(18,286)	(38,269)
State Income Tax Provision	437	970
Other	(2,333)	(1,554)
Income Tax Provision/(Benefit)	$ 1,072,524	$ (54,889)
Effective Tax Rate	21.32%	4.59%
Effective Tax Rate	(21.32%)	(4.59%)