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Note 12 - Leases - Lease Cost on the Consolidated Statement of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Total lease expense | $ 6,325 | $ 6,895
Lease costs capitalized | 31 | 491
Total lease costs | 6,356 | 7,386
Finance Lease Cost [Member] |  |
Total lease expense | 2,625 | 39
Production Expense [Member] |  |
Total lease expense | 1,286 | 3,838
General and Administrative Expense [Member] |  |
Total lease expense | 46 | 16
Lease Costs Billed to Joint Venture Owners [Member] |  |
Total lease expense | $ 2,368 | $ 3,002

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: |