VAALCO Energy, Inc. Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Information (Unaudited) (Details Textual)	3 Months Ended
	Dec. 31, 2012 Oil_liftings	Sep. 30, 2012 Oil_liftings	Jun. 30, 2012 Oil_liftings	Mar. 31, 2012 Oil_liftings
Quarterly Financial Information (Unaudited) (Textual) [Abstract]
The number of oil liftings conducted offshore Gabon	5	3	4	2