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Note 10 - Income Taxes - Income Tax Reconciliation (Details) - USD ($)
24 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Tax at statutory rates $ 61,481 $ 307,830
Statutory depletion (15,763) (18,175)
Section 179 deduction (1,149)
State income tax 3,109 62,137
Other (2,081)
Income tax on income $ 46,746 $ 350,643