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v3.23.1

Note 2 - Summary of Significant Accounting Policies (Details Textual) $ in Millions |  |  | 3 Months Ended | 4 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 19, 2022 USD ($) | Feb. 25, 2021 | Dec. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) MMBbls | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jan. 12, 2023 USD ($) | Oct. 13, 2022 USD ($)
Abandonment Funding Payment Due |  |  | $ 5.8 | $ 5.8 | $ 5.8 |  |  |  |
Accounts Receivable, before Allowance for Credit Loss, Noncurrent, Total |  |  | $ 13.9 | $ 13.9 | $ 13.9 | $ 9.6 |  |  |
Foreign Currency Exchange Rate, Translation |  |  | 612.6 | 612.6 | 612.6 | 578.2 |  |  |
Prepaid Insurance |  |  | $ 2.7 | $ 2.7 | $ 2.7 |  |  |  |
Prepaid Charter |  |  | 0.9 | 0.9 | 0.9 |  |  |  |
Foreign Currency Transaction Gain (Loss), before Tax, Total |  |  |  |  | (4.2) | $ (0.7) | $ (0.2) |  |
Etame Marine Block [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Working Interest Ownership Percentage |  | 27.80% |  |  |  |  |  |  |
Prepayments and Other [Member] |  |  |  |  |  |  |  |  |
Prepaid Expense and Other Assets |  |  | 4.0 | 4.0 | 4.0 |  |  |  |
TransGlobe [Member] |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Rate, Translation |  |  |  |  |  |  |  |  | 0.724
Other Receivables | $ 67.5 |  | 50.3 | 50.3 | 50.3 |  |  |  | $ 67.5
Merged Concession Agreement, Development Term (Year) | 15 years |  |  |  |  |  |  |  |
Merged Concession Agreement, Extension Term (Year) | 5 years |  |  |  |  |  |  |  |
Proceeds from Collection of Other Receivables |  |  | 17.2 |  | 17.2 |  |  |  |
Prepaid Expense and Other Assets |  |  | 7.2 | 7.2 | 7.2 |  |  |  |
Sasol Gabon S.A. [Member] |  |  |  |  |  |  |  |  |
Prepaid Royalties |  |  | 4.8 | 4.8 | 4.8 |  |  |  |
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] |  |  |  |  |  |  |  |  |
Other Receivables |  |  | 18.2 | $ 18.2 | 18.2 |  |  |  |
Oil and Gas, Delivered (Million Barrels of Oil) | MMBbls |  |  |  | 195 |  |  |  |  |
Accounts Payable, Other, Current |  |  | 17.9 | $ 17.9 | 17.9 |  |  |  |
Vaalco Energy Inc. and Other Etame Marin Block Owners [Member] |  |  |  |  |  |  |  |  |
Accounts Receivable, before Allowance for Credit Loss, Noncurrent, Total |  |  | $ 21.8 | $ 21.8 | $ 21.8 | $ 14.5 |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Account Prior to Conversion |  |  |  |  |  |  |  | $ 37.3 |

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