v3.26.1

Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Dec. 31, 2025	Mar. 10, 2026	Jun. 30, 2025
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-32167
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	76-0274813
Entity Address, Address Line One	2500 CityWest Blvd.Suite 400
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77042
City Area Code	713
Local Phone Number	623-0801
Title of 12(b) Security	Common Stock, par value $0.10
Trading Symbol	EGY
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 366.0
Entity Common Stock, Shares Outstanding		104,258,253
Documents Incorporated by Reference	Documents incorporated by reference: Portions of the definitive Proxy Statement of VAALCO Energy, Inc. relating to the Annual Meeting of Stockholders to be filed within 120 days after the end of the fiscal year covered by this Form 10-K, which are incorporated into Part III of this Form 10-K.
Entity Registrant Name	VAALCO ENERGY INC /DE/
Entity Central Index Key	0000894627
Amendment Flag	true
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2025
Amendment Description	To provide an updated Consent of Netherland, Sewell & Associates, Inc., Vaalco’s independent petroleum engineer, to correct a typographical error regarding one of the dates included in the original Consent of Netherland, Sewell & Associates, Inc. filed with the Original Form 10-K

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VAALCO ENERGY INC /DE/ 10-K/A