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Leases (Details)	12 Months Ended
	Jun. 30, 2022 item
Leases
Lessee, finance lease or short term lease, number of contracts	0

X

- Definition

Lessee, finance lease or short term lease, number of contracts

+ References

No definition available.

+ Details

Name:	epm_LesseeFinanceLeaseOrShortTermLeaseNumberOfContracts
Namespace Prefix:	epm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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