Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.0.8
Subsequent Events - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended 0 Months Ended
Sep. 30, 2014
Angola
Well
Dec. 31, 2014
Angola
Scenario Forecast
Oct. 31, 2014
Subsequent Event
Oct. 31, 2014
Subsequent Event
Angola
Well
Subsequent Event [Line Items]        
Production barrels of oil per day gross     2,500  
Production barrels of oil per day net     700  
Exploration activities expiry date Nov. 30, 2014      
Number of additional exploration wells due to exploration period extension       2
Number of total exploration wells       4
Total assessment of the exploration       $ 10
Assessment net to VAALCO       5
Recorded restricted cash 10.0 10.0    
Number of well satisfying well obligation 1      
Decrease in restricted cash $ 5.0