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Note 14 - Leases - Lease Cost on the Consolidated Statement of Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Total lease expense | $ 25,960 | $ 26,223 | $ 28,793
Lease costs capitalized | 2,615 | 147 | 1,171
Total lease costs | 28,575 | 26,370 | 29,964
Finance Lease Cost [Member] |  |  |
Total lease expense | 2,188 | 0 | 0
Production Expense [Member] |  |  |
Total lease expense | 12,222 | 13,457 | 7,904
General and Administrative Expense [Member] |  |  |
Total lease expense | 160 | 193 | 197
Lease Costs Billed to Joint Venture Owners [Member] |  |  |
Total lease expense | $ 11,390 | $ 12,573 | $ 20,692

X
- Definition Amount of lease costs capitalized, net. + References No definition available. + Details
Name: | egy_LeaseCostsCapitalizedNet
Namespace Prefix: | egy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of lease costs including capitalized costs. + References No definition available. + Details
Name: | egy_LeaseCostsIncludingCapitalizedCosts
Namespace Prefix: | egy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gross lease expense. + References No definition available. + Details
Name: | egy_LeaseExpenseGross
Namespace Prefix: | egy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=egy_FinanceLeaseCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=egy_ProductionExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=egy_LeaseCostsBilledToJointVentureOwnersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |