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Derivative financial instruments (Details 1) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Net cash receipts from (payments on) derivatives: | $ 1,520,988 | $ 370,356
Oil derivatives [Member] |  |
Net cash receipts from (payments on) derivatives: | 1,520,988 | 358,799
Natural gas derivatives [Member] |  |
Net cash receipts from (payments on) derivatives: | $ 0 | $ 11,557

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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |