Elected commitments under the credit facility.

No definition available.

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

- Definition

Current ratio.

+ References

No definition available.

+ Details

Name:	ampy_CurrentRatio
Namespace Prefix:	ampy_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of net leverage ratio to be maintained under the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	ampy_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of reasonably anticipated projected production of hydrocarbons from proved developed producing reserves for each calendar month.

+ References

No definition available.

+ Details

Name:	ampy_DebtInstrumentPercentageOfHedgingRequirementOfReasonablyAnticipatedProjectedProductionOfHydrocarbons
Namespace Prefix:	ampy_
Data Type:	dtr-types:percentItemType
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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
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-Publisher FASB
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+ Details

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

- 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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
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+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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+ Details

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

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

No definition available.

+ Details

Name:	us-gaap_UnamortizedDebtIssuanceExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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Balance Type:
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Long-Term Debt - Additional Information (Detail) $ in Thousands	Jul. 31, 2023	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt
Letters of credit outstanding		$ 0
Revolving Credit Facility
Debt
Total debt		125,000	$ 127,000
Borrowing capacity		145,000
Elected commitments		145,000
Line of credit facility, unused capacity, commitment fee percentage (in %)	0.50%
Net debt leverage ratio	3
Unamortized deferred financing costs		$ 2,900
Revolving Credit Facility \| For 24-month period following the effective date of the Revolving Credit Facility
Debt
Debt instrument, percentage of hedging requirement of reasonably anticipated projected production of hydrocarbons (in %)	75.00%
Revolving Credit Facility \| For 12-month period immediately following the First Period
Debt
Debt instrument, percentage of hedging requirement of reasonably anticipated projected production of hydrocarbons (in %)	50.00%
Revolving Credit Facility \| Minimum
Debt
Current ratio	1
Revolving Credit Facility \| Maximum
Debt
Current ratio	1
Revolving Credit Facility \| Base rate \| Minimum
Debt
Debt instrument, basis spread on variable rate (in %)	2.00%
Revolving Credit Facility \| Base rate \| Maximum
Debt
Debt instrument, basis spread on variable rate (in %)	3.00%
Revolving Credit Facility \| SOFR \| Minimum
Debt
Debt instrument, basis spread on variable rate (in %)	3.00%
Revolving Credit Facility \| SOFR \| Maximum
Debt
Debt instrument, basis spread on variable rate (in %)	4.00%