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Income taxes (Details 1) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Loss carry-forwards $ 4,071,054 $ 2,594,008
Depreciation, depletion and impairment 15,148,444 3,365,340
Unrecognized losses on derivatives 1,207 46,963
Total deferred tax assets 6,768,967 3,054,806
Valuation allowance (6,768,967) (3,054,806)
Net deferred taxes $ 0 $ 0