Annual report pursuant to Section 13 and 15(d)

Schedule I - Parent Company Financial Statement (Narrative) (Details)

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Schedule I - Parent Company Financial Statement (Narrative) (Details)
12 Months Ended
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%