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v3.21.2

Acquisitions and Dispositions (Narrative) (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 25, 2021 USD ($) | Nov. 30, 2006 | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Jun. 30, 2021 USD ($) $ / bbl | Jun. 30, 2020 USD ($) | Apr. 29, 2021 USD ($) | Feb. 24, 2021
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Bargain purchase gain |  |  |  |  |  |  | $ (7,651) |  |  |
Revenues |  |  | $ 47,023 |  | $ 17,974 |  | 86,797 | $ 36,363 |  |
Net income |  |  | $ 5,884 | $ 9,869 | $ 596 | $ (52,800) | 15,753 | $ (52,204) |  |
Sasol Gabon S.A. [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Bargain purchase gain | $ (7,700) |  |  |  |  |  |  |  |  |
Bargain purchase gain, net of tax | 5,500 |  |  |  |  |  |  |  |  |
Bargain purchase gain, income tax benefit | 2,200 |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  | 9,400 |  |  |
Net income |  |  |  |  |  |  | $ 1,200 |  |  |
Contingent consideration | $ 5,000 |  |  |  |  |  |  |  | $ 5,000 |
Contingent consideration, measurement period of oil price |  |  |  |  |  |  | 90 days |  |  |
Contingent consideration, oil price threshold | $ / bbl |  |  |  |  |  |  | 60.00 |  |  |
Discontinued Operations [Member] | Joint Operating With Republic Of Angola [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Joint operation agreement related to third party in working interest percentage |  | 40.00% |  |  |  |  |  |  |  |
Additional joint operation agreement related to third party in working interest percentage |  | 10.00% |  |  |  |  |  |  |  |
Etame Marine Block [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Working interest ownership, percentage | 58.80% |  |  |  |  |  |  |  |  | 31.10%
Etame Marine Block [Member] | Sasol Gabon S.A. [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Increase (decrease) in working interest ownership percentage | 27.80% |  |  |  |  |  |  |  |  |

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