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DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of components of Gain (loss) on derivative contracts (Details) - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Gain (loss) on derivative contracts | $ (6,720,320) | $ (4,502,080) | $ (73,586,199) | $ 32,900,767
Oil |  |  |  |
Gain (loss) on derivative contracts | $ (6,720,320) | $ (4,502,080) | (73,387,510) | $ 32,900,767
Natural Gas |  |  |  |
Gain (loss) on derivative contracts |  |  | $ (198,689) |

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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