XML 33 R86.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Selected Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, shares in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Revenues | $ 9,063,682 | $ 7,064,689 | $ 7,708,067 | [1] | $ 4,004,827 | $ 4,310,514 | $ 4,337,006 | [2] | $ 4,392,289 | [3] | $ 4,633,699 | $ 27,841,265 |  | $ 17,673,508 |  | $ 21,349,920 |
Operating income | 3,334,547 | 1,245,990 | 2,162,294 | [1] | 1,840,866 | 2,364,811 | 1,357,534 | [2] | (158,095) | [3] | 1,963,897 | 8,583,697 |  | 5,528,147 |  | 10,701,354 |
Net income available to common shareholders | $ 1,719,767 | $ 566,011 | $ 1,071,342 | [1] | $ 960,435 | $ 1,441,469 | $ 755,125 | [2] | $ (577,459) | [3] | $ 1,303,876 | $ 4,317,555 |  | $ 2,923,011 |  | $ 5,954,126 |
Basic net income per share (in dollars per share) | $ 0.05 | $ 0.02 | $ 0.03 | [1] | $ 0.03 | $ 0.04 | $ 0.02 | [2] | $ (0.02) | [3] | $ 0.05 | $ 0.13 |  | $ 0.09 |  | $ 0.21 |
Diluted net income per share (in dollars per share) | $ 0.05 | $ 0.02 | $ 0.03 | [1] | $ 0.03 | $ 0.04 | $ 0.02 | [2] | $ (0.02) | [3] | $ 0.04 | $ 0.13 |  | $ 0.09 |  | $ 0.19 |
Restructuring charges |  |  |  |  |  |  |  |  | $ 1,300,000 |  |  | $ (5,431) | [4] | $ 1,293,186 | [4] | $ 0 | [4]
Non-cash stock-based compensation expense |  |  |  |  |  |  |  |  | $ 800,000 |  |  |  |  |  |  |  |
Options and Incentive Warrants, Exercises (in shares) |  |  |  |  |  |  |  |  | 4.0 |  |  |  |  |  |  |  |
Options and Incentive Warrants outstanding (in shares) |  |  |  |  |  |  |  |  | 4.8 |  |  |  |  |  |  |  |
Officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-recurring expense related to retirement of officer |  |  |  |  |  |  | $ 608,000 |  |  |  |  |  |  |  |  |  |
Delhi Field |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | $ 27,573,641 |  | $ 16,908,666 |  | $ 19,219,036 |
Working interest |  |  | 23.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue interest |  |  | 19.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Impacted by the November 1, 2014 reversion of the Company's 23.9% working interest and 19.0% net revenue interest in the Delhi Field.
[2] | Includes $608,000 of non-recurring expenses related to the retirement of an officer of the Company.
[3] | Reflects a $1.3 million restructuring charge and $0.8 million of non-recurring expenses primarily associated with the exercise of 4.0 million of 4.8 million of previously outstanding stock options and warrants.
[4] | Restructuring charges for the year ended June 30, 2014 included non-cash stock-based compensation expense of $376,365.

X
- Definition Oil And Gas Properties, Revenue Interest Percentage Related to Reversionary Working Interest + References No definition available. + Details
Name: | epm_OilAndGasPropertiesRevenueInterestPercentageRelatedtoReversionaryWorkingInterest
Namespace Prefix: | epm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Oil And Gas Properties, Reversionary Working Interest Percentage + References No definition available. + Details
Name: | epm_OilAndGasPropertiesReversionaryWorkingInterestPercentage
Namespace Prefix: | epm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of share options (or share units) and incentive warrants exercised during the current period. + References No definition available. + Details
Name: | epm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndIncentiveWarrantsExercisesInPeriod
Namespace Prefix: | epm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares reserved for issuance under stock option agreements awarded under the plan and incentive warrants as authorized by the board of directors that validly exist and are outstanding as of the balance sheet date, including vested options. + References No definition available. + Details
Name: | epm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndIncentiveWarrantsOutstandingNumber
Namespace Prefix: | epm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.23) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
Name: | us-gaap_EarningsPerShareBasic
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
Name: | us-gaap_EarningsPerShareDiluted
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
Name: | us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of other expense that is infrequent in occurrence or unusual in nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6365513&loc=d3e15122-107781 + Details
Name: | us-gaap_OtherNonrecurringExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to 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=56944662&loc=d3e3602-108585 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) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
Name: | us-gaap_RestructuringCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_OfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=epm_DelhiFieldPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |