XML 31 R44.htm IDEA: XBRL DOCUMENT v2.4.1.9
Stock-Based Incentive Plan - Narrative (Details) (USD $)
3 Months Ended 9 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Restricted Stock and Contingent Restricted Stock          
Stock-Based Incentive Plan          
Stock-based compensation expense $ 242,835us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= epm_RestrictedStockandContingentRestrictedStockMember
$ 444,981us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= epm_RestrictedStockandContingentRestrictedStockMember
$ 731,192us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= epm_RestrictedStockandContingentRestrictedStockMember
$ 1,134,841us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= epm_RestrictedStockandContingentRestrictedStockMember
 
Performance-based Awards          
Stock-Based Incentive Plan          
Dividends paid on unvested and not probable awards         $ 15,328epm_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedandNotProbableCashDividendsPaid
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
2004 Stock Plan          
Stock-Based Incentive Plan          
Number of shares of common stock authorized for issuance under plan 6,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= epm_EvolutionPetroleumCorporationAmendedAndRestated2004StockPlanMember
  6,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= epm_EvolutionPetroleumCorporationAmendedAndRestated2004StockPlanMember
   
Number of shares remaining available for grant under plan 542,529us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= epm_EvolutionPetroleumCorporationAmendedAndRestated2004StockPlanMember
  542,529us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= epm_EvolutionPetroleumCorporationAmendedAndRestated2004StockPlanMember