XML 57 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Stock-Based Incentive Plan (Tables) | 12 Months Ended
--- | ---
Jun. 30, 2013
Stock-Based Incentive Plan |
Summary of information regarding outstanding Stock Options and Incentive Warrants and the changes during the fiscal year |
|  | Number of Stock Options and Incentive Warrants |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value(1) |  | Weighted Average Remaining Contractual Term (in years) |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Stock Options and Incentive Warrants outstanding at July 1, 2012 |  |  | 5,372,820 |  | $ | 1.83 |  |  |  |  |  |  |
Granted |  |  | — |  |  | — |  |  |  |  |  |  |
Exercised |  |  | (550,000 | ) | $ | 0.47 |  |  |  |  |  |  |
Cancelled or forfeited |  |  | — |  |  | — |  |  |  |  |  |  |
Expired |  |  | — |  |  | — |  |  |  |  |  |  |
Stock Options and Incentive Warrants outstanding at June 30, 2013 |  |  | 4,822,820 |  | $ | 1.99 |  | $ | 43,020,890 |  |  | 2.6 |
Vested or expected to vest at June 30, 2013 |  |  | 4,822,820 |  | $ | 1.99 |  | $ | 43,020,890 |  |  | 2.6 |
Exercisable at June 30, 2013 |  |  | 4,822,820 |  | $ | 1.99 |  | $ | 43,020,890 |  |  | 2.6 |
(1) Based upon the difference between the market price of our common stock on the last trading date of the period ($10.91 as of June 30, 2013) and the Stock Option or Incentive Warrant exercise price of in-the-money Stock Options and Incentive Warrants.
Summary of the status of unvested Stock Options and Incentive Warrants and the changes during the year |
|  | Number of Stock Options and Incentive Warrants |  | Weighted Average Grant-Date Fair Value |
--- | --- | --- | --- | --- | ---
Unvested at July 1, 2012 |  |  | 18,922 |  | $ | 2.45 |
Granted |  |  | — |  |  | — |
Vested |  |  | (18,922 | ) | $ | 2.45 |
Unvested at June 30, 2013 |  |  | — |  | $ | — |
Schedule of Restricted Stock transactions |
|  | Number of Restricted Shares |  | Weighted Average Grant-Date Fair Value |
--- | --- | --- | --- | --- | ---
Unvested at July 1, 2012 |  |  | 452,600 |  | $ | 5.16 |
Granted |  |  | 211,197 |  | $ | 7.88 |
Vested |  |  | (277,198 | ) | $ | 5.15 |
Unvested at June 30, 2013 |  |  | 386,599 |  | $ | 6.65 |

X
- Definition Tabular disclosure of the number and weighted-average grant date fair value for stock options and incentive warrants that were outstanding at the beginning and end of the year, and the number of stock options and incentive warrants that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | epm_ScheduleOfShareBasedCompensationNonvestedStockOptionsAndIncentiveWarrantsActivityTableTextBlock
Namespace Prefix: | epm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration