VAALCO Energy, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary Of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Debt (Narrative) (Details)

v3.8.0.1

Debt (Narrative) (Details) $ in Millions			12 Months Ended	27 Months Ended
Debt (Narrative) (Details) $ in Millions	Mar. 14, 2017 USD ($)	Jun. 29, 2016 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2019	Jun. 28, 2016	Jan. 31, 2014 USD ($)
Debt Instrument [Line Items]
Credit facility borrowing base		$ 20.0
Maximum borrowing capacity under loan agreement						$ 65.0
Debt service coverage ratio minimum at each quarter			1.2
Maximum [Member] \| Scenario, Forecast [Member]
Debt Instrument [Line Items]
Ratio of net debt to EBITDAX				3.0
Senior Tranche [Member]
Debt Instrument [Line Items]
Debt instrument, commitment fee					1.50%
Maximum borrowing capacity under loan agreement		50.0
Subordinated Tranche [Member]
Debt Instrument [Line Items]
Debt instrument, commitment fee					2.30%
Maximum borrowing capacity under loan agreement		15.0
Additional Term Loan [Member]
Debt Instrument [Line Items]
Credit facility borrowing base		5.0
Borrowings	$ 4.2
Additional Term Loan [Member] \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument interest rate spread	5.75%
Term Loan [Member]
Debt Instrument [Line Items]
Loans Payable		$ 15.0	$ 9.2
Term Loan [Member] \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument interest rate spread		5.75%

- Definition

Debt instrument commitment fee.

+ References

No definition available.

+ Details

Name:	egy_DebtInstrumentCommitmentFee
Namespace Prefix:	egy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Service Coverage Ratio Maximum At Each Quarter

+ References

No definition available.

+ Details

Name:	egy_DebtServiceCoverageRatioMinimumAtEachQuarter
Namespace Prefix:	egy_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Ratio Of Net Debt To EBITDAX

+ References

No definition available.

+ Details

Name:	egy_RatioOfNetDebtToEbitdax
Namespace Prefix:	egy_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16)(a)(2))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LoansPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=egy_AdditionalTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=egy_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: