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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Schedule of Major Customers [Table Text Block] | The following major customers and entities under common control accounted for 10 percent or more of the Company’s total oil, gas, and NGL production revenue for at least one of the periods presented:
| For the Years Ended December 31,
| 2020 |  | 2019 |  | 2018
Major customer #1 (1) | — | % |  | 18 | % |  | 18 | %
Major customer #2 (1) | 20 | % |  | 14 | % |  | 5 | %
Major customer #3 (1) | 24 | % |  | 13 | % |  | 7 | %
Major customer #4 (1) | 6 | % |  | 9 | % |  | 10 | %
Major customer #5 (1) | 15 | % |  | 4 | % |  | — | %
Group #1 of entities under common control (2) | 5 | % |  | 13 | % |  | 18 | %
Group #2 of entities under common control (2) | 7 | % |  | 11 | % |  | 12 | %
____________________________________________ (1)These major customers are purchasers of a portion of the Company’s production from its Midland Basin assets and South Texas assets. (2)In the aggregate, these groups of entities under common control represented purchasers of more than 10% of total oil, gas, and NGL production revenue for at least one of the periods presented; however, no individual entity comprising either group was a purchaser of more than 10% of the Company’s total oil, gas, and NGL production revenue.

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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