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Long-Term Incentive Plans - Summary of Information Regarding Restricted Stock Unit Awards (Parenthetical) (Detail) $ / shares in Units, $ in Millions | Sep. 30, 2022 USD ($) $ / shares
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TSUs [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Aggregate grant date fair value of restricted stock units issued | $ | $ 3.9
TSUs [Member] | Minimum [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Grant Date Market Price | $ 3.64
TSUs [Member] | Maximum [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Grant Date Market Price | $ 6.99
PRSU [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Aggregate grant date fair value of restricted stock units issued | $ | $ 1.2
PRSU [Member] | Maximum [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Grant Date Market Price | $ 6.20

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- Definition Grant date market price. + References No definition available. + Details
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Namespace Prefix: | ampy_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Share based compensation arrangement by share based payment award equity instruments other than options issued in period grant date fair value. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- 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
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Data Type: | xbrli:stringItemType
Balance Type: | na
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- Details
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Namespace Prefix: |
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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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