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Schedule I - Parent Company Financial Statement (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
VAALCO ENERGY, INC. [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Minimum percent of restricted net assets | 25.00% | 25.00%

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- Details
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