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Asset retirement obligations (Tables) | 12 Months Ended
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Dec. 31, 2020
Asset retirement obligations (Tables) |
Schedule of asset retirement obligations |
|  | For the year ended December 31, 2020 |  |  | For the year ended December 31, 2019 |
Asset retirement obligations, beginning of period |  | $ | 5,788,280 |  |  | $ | 230,650 |
Liabilities assumed in acquisitions |  |  | 9,508,484 |  |  |  | 5,251,329 |
Revision to estimates |  |  | (862,405 | ) |  |  | — |
Accretion expense |  |  | 929,858 |  |  |  | 306,301 |
Asset retirement obligation, end of period |  | $ | 15,364,217 |  |  | $ | 5,788,280 |

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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