XML 49 R31.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Stockholders' Equity (Tables) | 6 Months Ended
--- | ---
Dec. 31, 2018
Equity [Abstract] |
Dividends paid | The following table reflects the dividends paid within the respective three month periods:
| Fiscal Year
| 2018 |  | 2017
First quarter ended September 30, | $ | 0.10 |  |  | $ | 0.075 |
Second quarter ended December 31, | $ | 0.10 |  |  | $ | 0.075 |
Schedule of share repurchases | During the six months ended December 31, 2018 and 2017, the Company acquired treasury stock from holders of newly vested stock-based awards to fund the recipients' payroll tax withholding obligations. The treasury shares were subsequently canceled. Such shares were valued at fair market value on the date of vesting, as reflected in the following table:
| Six Months Ended December 31,
| 2018 |  | 2017
Number of treasury shares acquired | 15,489 |  |  | 55,018 |
Average cost per share | $ | 8.95 |  |  | $ | 7.19 |
Total cost of treasury shares acquired | $ | 138,638 |  |  | $ | 395,550 |

X
- Definition Schedule Of Share Repurchases [Table Text Block] + References No definition available. + Details
Name: | epm_ScheduleOfShareRepurchasesTableTextBlock
Namespace Prefix: | epm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information related to dividends declared, including paid and unpaid dividends. + References No definition available. + Details
Name: | us-gaap_DividendsDeclaredTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration