2.4.0.84110 - Disclosure - Related Party Transactions (Details)truefalsefalse1false USDtruefalse$I2005Q4_M0506_BoardOfDirectorMemberhttp://www.sec.gov/CIK0001006655instant2005-05-06T00:00:000001-01-01T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2false USDtruefalse$I2004_BoardOfDirectorMemberhttp://www.sec.gov/CIK0001006655instant2004-06-30T00:00:000001-01-01T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3false truefalseD2012Q4_M05_BoardOfDirectorMember_CommonStockMemberhttp://www.sec.gov/CIK0001006655duration2012-05-01T00:00:002012-05-31T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberfalsefalseCommon stockus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommonStockMemberus-gaap_StatementClassOfStockAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli04false truefalseD2011Q3_M03_BoardOfDirectorMember_CommonStockMemberhttp://www.sec.gov/CIK0001006655duration2011-03-01T00:00:002011-03-31T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberfalsefalseCommon stockus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommonStockMemberus-gaap_StatementClassOfStockAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli05false truefalseD2013_BoardOfDirectorMember_CaganMcAfeeCapitalPartnersLLCMemberhttp://www.sec.gov/CIK0001006655duration2012-07-01T00:00:002013-06-30T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberfalsefalseCMCPepm_RelatedPartySecondaryCategorizationAxisxbrldihttp://xbrl.org/2006/xbrldiepm_CaganMcAfeeCapitalPartnersLLCMemberepm_RelatedPartySecondaryCategorizationAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli06false USDtruefalse$I2004Q4_M0526_BoardOfDirectorMember_CaganMcAfeeCapitalPartnersLLCMemberhttp://www.sec.gov/CIK0001006655instant2004-05-26T00:00:000001-01-01T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberfalsefalseCMCPepm_RelatedPartySecondaryCategorizationAxisxbrldihttp://xbrl.org/2006/xbrldiepm_CaganMcAfeeCapitalPartnersLLCMemberepm_RelatedPartySecondaryCategorizationAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$7false truefalseD2010Q2_M10_BoardOfDirectorMember_CaganMcAfeeCapitalPartnersLLCMember_CommonStockMemberhttp://www.sec.gov/CIK0001006655duration2009-10-01T00:00:002009-10-31T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberfalsefalseCMCPepm_RelatedPartySecondaryCategorizationAxisxbrldihttp://xbrl.org/2006/xbrldiepm_CaganMcAfeeCapitalPartnersLLCMemberepm_RelatedPartySecondaryCategorizationAxisexplicitMemberfalsefalseCommon stockus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommonStockMemberus-gaap_StatementClassOfStockAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli08false truefalseD2013_BoardOfDirectorMember_CaganMcAfeeCapitalPartnersLLCMember_MaximumMemberhttp://www.sec.gov/CIK0001006655duration2012-07-01T00:00:002013-06-30T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberfalsefalseCMCPepm_RelatedPartySecondaryCategorizationAxisxbrldihttp://xbrl.org/2006/xbrldiepm_CaganMcAfeeCapitalPartnersLLCMemberepm_RelatedPartySecondaryCategorizationAxisexplicitMemberfalsefalseHigh end of rangeus-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli09false truefalseD2013_BoardOfDirectorMember_CaganMcAfeeCapitalPartnersLLCMember_MinimumMemberhttp://www.sec.gov/CIK0001006655duration2012-07-01T00:00:002013-06-30T00:00:00falsefalseLaird Q. Caganus-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldiepm_BoardOfDirectorMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMemberfalsefalseCMCPepm_RelatedPartySecondaryCategorizationAxisxbrldihttp://xbrl.org/2006/xbrldiepm_CaganMcAfeeCapitalPartnersLLCMemberepm_RelatedPartySecondaryCategorizationAxisexplicitMemberfalsefalseLow end of rangeus-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli01true 3us-gaap_RelatedPartyTransactionLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Related Party Transactions2false 4epm_RelatedPartyTransactionCashFeesAsPercentageOfGrossEquityProceedsepm_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalse5falsetruefalse00falsefalsefalse6falsetruefalse00falsefalsefalse7falsetruefalse00falsefalsefalse8truetruefalse0.080.08falsefalsefalse9truetruefalse0.040.04falsefalsefalsenum:percentItemTypepureRepresents the cash fees as a percentage of gross equity proceeds that could be earned by the related party for providing financial advisory services.No definition available.false0Cash fees as a percentage of gross equity proceeds in private equity financings3false 4epm_RelatedPartyTransactionFixedWarrantFeePercentageepm_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalse5truetruefalse0.040.04falsefalsefalse6falsetruefalse00falsefalsefalse7falsetruefalse00falsefalsefalse8falsetruefalse00falsefalsefalse9falsetruefalse00falsefalsefalsenum:percentItemTypepureRepresents the fixed warrant fees as a percentage of gross equity proceeds that could be earned by the related party for providing financial advisory services.No definition available.false0Fixed warrant fee as a percentage of gross equity proceeds in private equity financings4false 4epm_ClassOfWarrantOrRightWarrantsExercisedSharesIssuedNetOfSharesCancelledInLieuOfCashPaymentepm_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse6526165261falsefalsefalse4truefalsefalse5835058350falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7truefalsefalse119795119795falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesThe number of shares issued as a result of the cashless exercise of warrants during the period, net of shares cancelled in lieu of payment of cash consideration.No definition available.false1Number of shares of common stock issued through a net cashless exercise of a placement warrant5false 4us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse9120091200falsefalsefalse2truefalsefalse6694366943falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6truefalsefalse165000165000falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesThe specified number of securities that each class of warrants or rights outstanding give the holder the right but not the obligation to purchase from the issuer at a specific price, on or before a certain date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 2 -Article 4 false1Number of shares of common stock that can be purchased against warrants, under the right to purchase6false 4us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse2.502.50USD$falsetruefalse2truefalsefalse1.001.00USD$falsetruefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6truefalsefalse1.001.00USD$falsetruefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalseus-types:perUnitItemTypedecimalThe exercise price of each class of warrants or rights outstanding.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 4 -Article 4 false3Exercise price of warrants (in dollars per share)falseRelated Party Transactions (Details) (Laird Q. Cagan, USD $)UnKnownNoRoundingNoRoundingUnKnowntruefalsefalseSheethttp://www.evolutionpetroleum.com/role/DisclosureRelatedPartyTransactionsDetails96