Risk Management and Derivative Instruments - Open Commodity Positions (Detail)	3 Months Ended
Mar. 31, 2023 MMBTU $ / bbl bbl
Natural Gas Derivative Two Way Collars Contracts 2023 [Member]
Derivative [Line Items]
Average monthly volume (MMBtu) \| MMBTU	1,282,222
Weighted-average floor price	3.49
Weighted-average ceiling price	5.81
Crude Oil Derivative Contracts Fixed Price Swap 2023 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) \| bbl	55,000
Weighted-average fixed price	57.31
Crude Oil Derivative Three Way Collars Contracts 2023 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) \| bbl	50,000
Weighted-average floor price	58.00
Weighted-average ceiling price	74.54
Weighted-average sub-floor price	43.00
Natural Gas Derivative Two Way Collars Contracts 2024 [Member]
Derivative [Line Items]
Average monthly volume (MMBtu) \| MMBTU	220,833
Weighted-average floor price	3.31
Weighted-average ceiling price	4.73

Derivative sub floor price.

No definition available.

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

- Definition

Derivative weighted average fixed price.

+ References

No definition available.

+ Details

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

- Definition

The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeCapPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFloorPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

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

- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=ampy_NaturalGasDerivativeTwoWayCollarContractsTwoThousandTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=ampy_CrudeOilDerivativeFixedPriceSwapTwoThousandTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=ampy_CrudeOilDerivativeThreeWayCollarTwoThousandTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=ampy_NaturalGasDerivativeTwoWayCollarsContracts2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: