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

Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended		12 Months Ended								3 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended	3 Months Ended	48 Months Ended	1 Months Ended	12 Months Ended
	Jul. 31, 2012	Dec. 31, 2010	Dec. 31, 2013 Well	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Ovaka Well	Dec. 31, 2013 Gabon Obligation	Dec. 31, 2012 Gabon Obligation	Dec. 31, 2011 Gabon Obligation	Dec. 31, 2013 Offshore Gabon Sqkms	Mar. 31, 2014 Offshore Gabon Subsequent Events	Dec. 31, 2013 Offshore Gabon Seismic Obligation Sqkms Well	Dec. 31, 2013 Offshore Gabon Omangou Prospect Well	Nov. 30, 2006 Angola Well	Dec. 31, 2013 Angola acre Well	Dec. 31, 2012 Angola	Jan. 31, 2007 Angola Seismic Obligation Sqkms	Dec. 31, 2008 Angola Seismic Obligation Sqkms	Nov. 01, 2010 Angola Seismic Obligation Sqkms	Sep. 30, 2012 South Dakota acre	Dec. 31, 2013 South Dakota
Commitments And Contingencies Textual Abstract
Period of Charter				2 years
Company s share of the charter payment				28.10%
Charter fee for production up to 20,000 BOPD			0.93		0.25
Charter fee for those bbls produced in excess of 20,000 BOPD			2.50
Company's share of charter expense			$ 10.4	$ 9.7	$ 7.3
Rent expense, operating leases			4.1	4.4	3.6
Extended drilling period	2 years	1 year
Liabilities, guarantees' fair value			1.1	1.2
Discount							25.00%
Contractual Obligation Company Share							3.0	3.7	2.8
Contractual Obligation accrued amount							2.9
Cost for acquire property										5.3
Length of acquired property										150
Number of exploration wells												2	1	2
Cost related to drilling						17.2							8.6	29.5
Cost related to share of drilling						5.9							2.6
Cost related to drilling						17.2							8.6	29.5
Cost related to share of drilling						5.9							2.6
Acquisition related to obligation												223
Number of exploration wells drilling required to pay remaining obligation
Annual funding related to production license, term											7 years
Percentage of annual funding over seven years											12.14%
Percentage of annual funding over last three years											5.00%
Abandonment cost related to annual funding			10.1							10.1
Length of acquired property																	1,175	524	1,000
Area under acquire property exploration rights agreement term															1,400,000
Joint operation agreement related to third party in working interest percentage														40.00%
Additional joint operation agreement related to third party in working interest percentage														10.00%
Production license agreement term														4 years
Production license agreement term extended by government														3 years
Drilling cost to company														14.8
Seismic obligation cost to company																	3.75	3.00
Cost related to seismic obligation, gross																	7.5	6.0
Percentage of working interest for amounts owned															40.00%					100.00%
Percentage of carried interest															10.00%
Allowance for accounts with partners			7.6	6.0												7.6
Allowance recorded for accounts receivable with remainder															1.6
Gross area of acquired property																				10,000
Additional amount to drill and complete additional well																					3.6
Dry hole Costs (Drilling Expenses)			23.9	37.3	0.1																2.9
Percentage of working interest for amounts owned															40.00%					100.00%
Well penalty, minimum			5.0
Well penalty, maximum			10.0
Recorded restricted cash			$ 10.0
Number of exploration wells intended for drilling after working interest assignment completed															2