Name:	us-gaap_DerivativeAverageCapPrice
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The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

No definition available.

Name:	us-gaap_DerivativeAverageFloorPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
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Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

Name:	us-gaap_DerivativeLineItems
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Period Type:	duration

Nominal energy measure used to calculate payments on a derivative instrument.

No definition available.

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:energyItemType
Balance Type:	na
Period Type:	duration

Nominal volume used to calculate payments on a derivative instrument.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
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Data Type:	dtr-types:volumeItemType
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Period Type:	duration

Average fixed price related to the group of price risk swap derivatives.

No definition available.

Name:	us-gaap_DerivativeSwapTypeAverageFixedPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
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Name:	srt_EnergyAxis=srt_CrudeOilMember
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Name:	us-gaap_DerivativeInstrumentRiskAxis=egy_CrudeOilCollarOctober2025ToDecember2025Member
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Name:	us-gaap_DerivativeInstrumentRiskAxis=egy_CrudeOilCollarJanuary2026ToMarch2026Member
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Name:	us-gaap_DerivativeInstrumentRiskAxis=egy_CrudeOilCollarApril2026ToJune2026Member
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Name:	us-gaap_DerivativeInstrumentRiskAxis=egy_CrudeOilCollarJuly2026ToSeptember2026Member
Namespace Prefix:
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Name:	srt_EnergyAxis=srt_NaturalGasPerThousandCubicFeetMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_DerivativeInstrumentRiskAxis=egy_NaturalGasSwapOctober2025ToDecember2025Member
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Name:	us-gaap_DerivativeInstrumentRiskAxis=egy_NaturalGasSwapJanuary2026ToMarch2026Member
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