Note 8 - Income Taxes - Deferred Income Taxes (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Net deferred tax assets	$ 231,744	$ 329,121
Casualty Loss [Member]
Net deferred tax liabilities	(77,714)	(77,714)
Deferred Gain [Member]
Net deferred tax liabilities	(109,950)	(109,950)
Net Operating Loss Carryover [Member]
Net deferred tax assets	59,807	0
Percentage Depletion Carryover [Member]
Net deferred tax assets	0	0
Stock-based Compensation [Member]
Net deferred tax assets	$ 359,601	$ 516,785