XML 77 R59.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Restructuring - Schedule of Restructuring and Related Costs (Details) - USD ($) | 6 Months Ended | 18 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015
Salary expense |  |
Restructuring Reserve [Roll Forward] |  |
Beginning balance |  | $ 615,721
Payments |  | (615,721)
Adjustment to Cost |  | 0
Ending balance |  | 0
Incentive compensation costs |  |
Restructuring Reserve [Roll Forward] |  |
Beginning balance |  | 185,525
Payments |  | (185,525)
Adjustment to Cost |  | 0
Ending balance |  | 0
Payroll taxes and benefits expense |  |
Restructuring Reserve [Roll Forward] |  |
Beginning balance |  | 154,575
Payments |  | (110,144)
Adjustment to Cost |  | (44,431)
Ending balance |  | 0
Accrued liability for restructuring costs |  |
Restructuring Reserve [Roll Forward] |  |
Beginning balance |  | 955,821
Payments |  | (911,390)
Adjustment to Cost |  | (44,431)
Ending balance |  | $ 0
GARP |  |
Restructuring Reserve [Roll Forward] |  |
Beginning balance | $ 628,866 |
Payments | (209,378) |
Adjustment to Cost | 0 |
Ending balance | 419,488 |
GARP | Salary expense |  |
Restructuring Reserve [Roll Forward] |  |
Beginning balance | 530,387 |
Payments | (176,796) |
Adjustment to Cost | 0 |
Ending balance | 353,591 |
GARP | Payroll taxes and benefits expense |  |
Restructuring Reserve [Roll Forward] |  |
Beginning balance | 98,479 |
Payments | (32,582) |
Adjustment to Cost | 0 |
Ending balance | $ 65,897 |

X
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
Name: | us-gaap_PaymentsForRestructuring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
Name: | us-gaap_RestructuringReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringReserveAccrualAdjustment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_RestructuringReserveRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=epm_SalaryExpenseRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=epm_CashIncentiveRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=epm_PayrollTaxesandBenefitsRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=epm_GARPAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |