Name:	ampy_AmountAgreedToBeReceivableInSettlement
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The approximate amount of net payment receivable in a settlement from owners and operators relating to vessels that struck and damaged the pipeline.

No definition available.

Name:	ampy_ApproximateNetPaymentReceivableInSettlement
Namespace Prefix:	ampy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Commitment fee expense.

No definition available.

Name:	ampy_CommitmentFeeExpense
Namespace Prefix:	ampy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Commitments and contingencies.

No definition available.

Name:	ampy_CommitmentsAndContingenciesAdditionalTextualAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Decommissioning obligations supported by cash.

No definition available.

Name:	ampy_DecommissioningObligationsSupportedByCash
Namespace Prefix:	ampy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Decommissioning obligations supported by surety bonds.

No definition available.

Name:	ampy_DecommissioningObligationsSupportedBySuretyBonds
Namespace Prefix:	ampy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of pipeline incident settlement liability included in Other long-term liabilities.

No definition available.

Name:	ampy_LitigationSettlementNoncurrentLiability
Namespace Prefix:	ampy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Installment period of contingent payment.

No definition available.

Name:	ampy_LossContingencyInstallmentPeriod
Namespace Prefix:	ampy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Probation period of contingent payment.

No definition available.

Name:	ampy_LossContingencyProbationPeriod
Namespace Prefix:	ampy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The reimbursement amount payable to government agencies in a loss contingency.

No definition available.

Name:	ampy_LossContingencyReimbursementAmountPayableToGovernmentAgencies
Namespace Prefix:	ampy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Monthly deposit into sinking fund account.

No definition available.

Name:	ampy_MonthlyDepositIntoSinkingFundAccount1
Namespace Prefix:	ampy_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

Number of misdemeanor charges.

No definition available.

Name:	ampy_NumberOfMisdemeanorCharges
Namespace Prefix:	ampy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The amount of accrued liability of pipeline incident settlement, classified as current.

No definition available.

Name:	ampy_PipelineIncidentSettlementAccruedLiabilityCurrent
Namespace Prefix:	ampy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Sinking fund account maximum amount.

No definition available.

Name:	ampy_SinkingFundAccountMaximumAmount
Namespace Prefix:	ampy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481899/410-30-55-11

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
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-Name Accounting Standards Codification
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org//1943274/2147481931/410-30-50-10

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Name:	us-gaap_AccruedEnvironmentalLossContingenciesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
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Period Type:	instant

Amount awarded to other party in judgment or settlement of litigation.

No definition available.

Name:	us-gaap_LitigationSettlementAmountAwardedToOtherParty
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

No definition available.

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

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
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Balance Type:	debit
Period Type:	instant

Name:	srt_StatementGeographicalAxis=stpr_OK
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TypeOfArrangementAxis=ampy_SouthernCaliforniaPipelineIncidentAndOilReleaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TypeOfArrangementAxis=ampy_AgreementWithUnitedStatesGovernmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TypeOfArrangementAxis=ampy_AgreementWithStateOfCaliforniaMember
Namespace Prefix:
Data Type:	na
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