XML 103 R57.htm IDEA: XBRL DOCUMENT
v3.20.2

Subsequent Event (Details) - Revolving credit facility - Senior Secured Reserve-Based Credit Facility - Line of Credit - USD ($) | Nov. 02, 2020 | Sep. 30, 2020
--- | --- | ---
Subsequent Event [Line Items] |  |
Initial borrowing base |  | $ 27,000,000
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Floor interest rate | 0.25% |
Initial borrowing base | $ 23,000,000 |

X
- Definition Debt Instrument, Floor Interest Rate + References No definition available. + Details
Name: | epm_DebtInstrumentFloorInterestRate
Namespace Prefix: | epm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line of Credit Facility, Initial Borrowing Base + References No definition available. + Details
Name: | epm_LineofCreditFacilityInitialBorrowingBase
Namespace Prefix: | epm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=epm_SeniorSecuredReserveBasedCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |