Quarterly report pursuant to Section 13 or 15(d)

Impairment of Proved Properties - Additional Information (Detail)

v2.4.1.9
Impairment of Proved Properties - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Impairment Of Proved Properties [Line Items]    
Impairment of Oil and Gas Properties $ 5,400,000us-gaap_ImpairmentOfOilAndGasProperties $ 0us-gaap_ImpairmentOfOilAndGasProperties
Southeast Etame And North Tchibala field    
Impairment Of Proved Properties [Line Items]    
Asset value remaining after impairment charges $ 0egy_AssetCarryingValueAfterImpairmentCharges
/ dei_LegalEntityAxis
= egy_SoutheastEtameAndNorthTchibalaMember