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Note 3 - Property and Equipment (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Gain (Loss) on Disposition of Oil and Gas and Timber Property, Total $ 184,045 $ 220,800 $ 590,265 $ 253,907
Depreciation, Total $ 503 $ 234 1,010 467
Depletion, Total     430 184
Land [Member]        
Gain (Loss) on Disposition of Oil and Gas and Timber Property, Total     $ 590,265 $ 253,907