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Note 4 - Property and Equipment (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Gain (Loss) on Disposition of Oil and Gas and Timber Property, Total $ 41,331 $ 295,238 $ 80,876
Depreciation, Total $ 1,326 $ 507 1,793 1,517
Depletion, Total     683 288
Land [Member]        
Gain (Loss) on Disposition of Oil and Gas and Timber Property, Total     $ 295,238 $ 80,876