XML 60 R34.htm IDEA: XBRL DOCUMENT
v3.20.1

Organization and Accounting Policies (Narrative) (Details) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) / $ | Mar. 31, 2019 USD ($) | Jun. 20, 2026 | Dec. 31, 2019 / $ | Dec. 31, 2018
Organization And Accounting Policies [Line Items] |  |  |  |  |
Receivable balance, gross, noncurrent | $ 3,500 |  |  |  |
Exchange rate | / $ | 593.1 |  |  | 585.7 |
Bad debt recovery (expense) | $ (810) | $ 29 |  |  |
Transfers between levels | 0 | 0 |  |  |
Consortium [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Receivable balance, gross, noncurrent | 10,400 |  |  |  |
Government Of Gabon [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Bad debt recovery (expense) | $ (800) | $ 32 |  |  |
Prior Production Sharing Contract, Through September 17, 2018 [Member] | Consortium [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Monthly royalty rate, based on production at the published price | 13.00% |  |  |  |
Prior Production Sharing Contract, Through September 17, 2018 [Member] | Government Of Gabon [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Monthly royalty rate, based on production at the published price | 13.00% |  |  |  |
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Government Of Gabon [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Monthly royalty rate, based on production at the published price | 13.00% |  |  |  |
Etame Marine Block [Member] | Prior Production Sharing Contract, Through September 17, 2018 [Member] | Consortium [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Working interest ownership, percentage | 7.50% |  |  |  |
Etame Marine Block [Member] | Prior Production Sharing Contract, Through September 17, 2018 [Member] | Government Of Gabon [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Working interest ownership, percentage |  |  |  |  | 7.50%
Etame Marine Block [Member] | Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Government Of Gabon [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Working interest ownership, percentage | 7.50% |  |  |  |
Etame Marine Block [Member] | Scenario, Forecast [Member] | Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Government Of Gabon [Member] |  |  |  |  |
Organization And Accounting Policies [Line Items] |  |  |  |  |
Working interest ownership, percentage |  |  | 10.00% |  |

X
- Definition Monthly Royalty Rate, Based On Production At The Published Price + References No definition available. + Details
Name: | egy_MonthlyRoyaltyRateBasedOnProductionAtPublishedPrice
Namespace Prefix: | egy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Organization And Accounting Policies [Line Items] + References No definition available. + Details
Name: | egy_OrganizationAndAccountingPoliciesLineItems
Namespace Prefix: | egy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Working Interest Ownership, Percentage + References No definition available. + Details
Name: | egy_WorkingInterestOwnershipPercentage
Namespace Prefix: | egy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
Name: | us-gaap_AccountsReceivableGrossNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 + Details
Name: | us-gaap_ForeignCurrencyExchangeRateTranslation1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=egy_VaalcoEnergyInc.AndOtherEtameMarinBlockOwnersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=egy_GovernmentOfGabonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=egy_PriorProductionSharingContractThroughSeptember172018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=egy_ProductionSharingContractSeptember172018ThroughSeptember162028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=egy_EtameMarineBlockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |