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Note 6 - Income Taxes - Reconciliation of Computed Income Tax (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Computed Federal Tax Provision/(Benefit) $ 251,036 $ (523,015)
Increase (Decrease) in Tax from:    
Allowable Depletion in Excess of Basis (148,538)  
Federal Tax Carrybacks (118,534)  
Dividend Received Deduction (38,269) (891)
State Income Tax Provision 970 176
Other (1,554) (10,563)
Total Benefit $ (54,889) $ (534,293)
Effective Tax Rate 5.00% (21.00%)
Effective Tax Rate (5.00%) 21.00%