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v2.4.1.9

Restructuring - Schedule of Restructuring Charges (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Nov. 01, 2013
Current estimate of remaining accrued restructuring charges |  |
Beginning Balance |  | $ 1,332,186 us-gaap_RestructuringReserve
Ending Balance |  | 1,332,186 us-gaap_RestructuringReserve
Salary continuation liability |  |
Current estimate of remaining accrued restructuring charges |  |
Beginning Balance | 615,721 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_SalaryExpenseRestructuringMember |
Payments | (615,721)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = epm_SalaryExpenseRestructuringMember |
Adjustment to Cost | 0 us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = epm_SalaryExpenseRestructuringMember |
Ending Balance | 0 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_SalaryExpenseRestructuringMember |
Incentive compensation costs |  |
Current estimate of remaining accrued restructuring charges |  |
Beginning Balance | 185,525 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_CashIncentiveRestructuringMember |
Payments | (185,525)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = epm_CashIncentiveRestructuringMember |
Adjustment to Cost | 0 us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = epm_CashIncentiveRestructuringMember |
Ending Balance | 0 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_CashIncentiveRestructuringMember |
Other benefit costs and employer taxes |  |
Current estimate of remaining accrued restructuring charges |  |
Beginning Balance | 154,575 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_OtherBenefitsRestructuringMember |
Payments | (110,144)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = epm_OtherBenefitsRestructuringMember |
Adjustment to Cost | (44,431)us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = epm_OtherBenefitsRestructuringMember |
Ending Balance | 0 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_OtherBenefitsRestructuringMember |
Accrued restructuring charges |  |
Current estimate of remaining accrued restructuring charges |  |
Beginning Balance | 955,821 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |
Payments | (911,390)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |
Adjustment to Cost | (44,431)us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |
Ending Balance | $ 0 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |

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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- 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 SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments. + 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)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394291&loc=d3e17658-110867 + Details
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