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Note 6 - Revenue (Details Textual) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 20, 2026 | Dec. 31, 2021
Taxes Payable, Current, Total | $ 29,221 |  | $ 3,128
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] |  |  |
Purchase Agreement Payment Period (Day) | 30 days |  |
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Foreign Tax Authority [Member] | Tax Administration of Gabon [Member] |  |  |
Income Taxes Receivable, Current | $ 29,200 |  |
Taxes Payable, Current, Total | $ 3,100 |  |
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Vaalco Energy Inc. and Other Etame Marin Block Owners [Member] |  |  |
Working Interest Ownership, Percentage | 7.50% |  |
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Vaalco Energy Inc. and Other Etame Marin Block Owners [Member] | Forecast [Member] |  |  |
Working Interest Ownership, Percentage |  | 10.00% |
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Government of Gabon [Member] |  |  |
Monthly Royalty Rate, Based on Production at the Published Price | 13.00% |  |

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