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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

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