Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual Significant Accounting Policies Investment, Policy [Policy Text Block] us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) Note 2 - Current Liabilities ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 2 - Current Liabilities - Components of Accounts Payable and Accrued (Details) ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Notes To Financial Statements Trading Arrangements, by Individual [Table] Notes To Financial Statements [Abstract] us-gaap_IncomeLossAttributableToParent Net income Material Terms of Trading Arrangement [Text Block] Product and Service, Other [Member] Minimum [Member] Statistical Measurement [Domain] Maximum [Member] us-gaap_IncreaseDecreaseInAccountsReceivable Production accounts receivable CASH FLOWS FROM OPERATING ACTIVITIES CASH FLOWS FROM INVESTING ACTIVITIES us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash provided by (used in) investing activities Accounting Policies [Abstract] Income Statement [Abstract] us-gaap_NumberOfOperatingSegments Number of Operating Segments us-gaap_NumberOfReportableSegments Number of Reportable Segments Net income NET INCOME Net income Adjustments to reconcile net income to net cash provided by operating activities: us-gaap_LiabilitiesAndStockholdersEquity TOTAL LIABILITIES AND PARTNERS' EQUITY Title and Position [Axis] us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities Total adjustments Subsequent Event [Member] us-gaap_CostsAndExpenses Total cost of revenues Changes in assets and liabilities: Accounts payable us-gaap_IncreaseDecreaseInAccountsPayable Accounting Standards Update and Change in Accounting Principle [Table] Income Tax, Policy [Policy Text Block] Accrued expenses us-gaap_IncreaseDecreaseInAccruedLiabilities us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect NET CHANGE IN CASH AND EQUIVALENTS Current portion of asset retirement obligations us-gaap_RelatedPartyDepositLiabilities Related Party Deposit Liabilities us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding Limited Partners' Capital Account, Units Outstanding (in shares) ASSET RETIREMENT OBLIGATIONS us-gaap_LimitedPartnersCapitalAccountUnitsAuthorized Limited Partners' Capital Account, Units Authorized (in shares) us-gaap_LimitedPartnersCapitalAccountUnitsIssued Limited Partners' Capital Account, Units Issued (in shares) LIMITED PARTNERS' EQUITY, SUBJECT TO REPURCHASE RIGHT us-gaap_OilAndGasDeliveryCommitmentsAndContractsFixedPrice Oil and Gas, Delivery Commitment, Fixed Price New Accounting Pronouncements, Policy [Policy Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations CASH AND EQUIVALENTS - BEGINNING OF PERIOD CASH AND EQUIVALENTS - END OF PERIOD Statement [Table] Asset Retirement Obligation [Policy Text Block] Authorized - 8,000,000 Units Issued and outstanding - 4,610,646 Units OTHER INCOME Statement of Financial Position [Abstract] us-gaap_NonoperatingIncomeExpense Total other income us-gaap_PropertyPlantAndEquipmentOther Corporate and other Product and Service [Domain] Product and Service [Axis] OTHER ASSETS dei_DocumentType Document Type Document Information [Line Items] dei_DocumentQuarterlyReport Document Quarterly Report us-gaap_IncreaseDecreaseInOtherNoncurrentAssets Other assets Document Information [Table] us-gaap_IncreaseDecreaseInOtherCurrentAssets Other current assets dei_EntityInteractiveDataCurrent Entity Interactive Data Current us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) dei_DocumentTransitionReport Document Transition Report Commitments and Contingencies Disclosure [Text Block] Statement [Line Items] us-gaap_UnrealizedGainLossOnInvestments Unrealized (gain) loss on investments Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] us-gaap_GasImbalancePayableCurrentAndNoncurrent Gas Balancing Payable Title and Position [Domain] Earnings Per Share, Policy [Policy Text Block] Accounts payable Total accounts payable us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables Document Fiscal Period Focus Document Fiscal Year Focus Amendment Flag us-gaap_AccountsPayableOtherCurrent Other Investments Accrued expenses Total accrued expenses dei_DocumentPeriodEndDate Document Period End Date General Partner [Member] Limited Partner [Member] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Legal Entity [Axis] Payroll and retirement plan contributions Accretion expense dei_EntityFileNumber Entity File Number Depreciation, depletion and amortization dei_EntityTaxIdentificationNumber Entity Tax Identification Number Other general and administrative Entity [Domain] Entity Central Index Key dei_EntityRegistrantName Entity Registrant Name eepl_ActualProcessingTimeForSalesTransaction Actual Processing Time for Sales Transaction (Day) Days after the month of oil and gas production delivery to process transactions. dei_EntityCurrentReportingStatus Entity Current Reporting Status Accrued Expenses: dei_EntityIncorporationStateCountryCode Entity Incorporation, State or Country Code Accounts Payable: Current Fiscal Year End Date Federal, state and local taxes DIRECT COST OF REVENUES Employees [Member] Represents employees. eepl_InitialPercentageOfRevenueAndCostAllocation Initial Percentage of Revenue and Cost Allocation Initial percentage of revenue and cost allocation per terms of the limited partnership agreement upon formation of the Company. eepl_NumberOfUncertainTaxPositions Number of Uncertain Tax Positions The number of uncertain tax positions the Company has that are material to the financial statements. Proceeds from disposal of property and equipment dei_EntityFilerCategory Entity Filer Category Organization [Policy Text Block] Disclosure of the Company's organizational structure. dei_EntityShellCompany Entity Shell Company PROPERTY AND EQUIPMENT dei_EntityEmergingGrowthCompany Entity Emerging Growth Company Production costs Production and related other Carrying value as of the balance sheet date of obligations incurred and payable for the production of oil and gas. dei_EntitySmallBusiness Entity Small Business us-gaap_OperatingIncomeLoss INCOME FROM OPERATIONS us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities Total direct cost of revenues eepl_PercentageOfAdjustedBookValueOfCompanyAllocableToTheRepurchaseRightPerUnit Percentage of Adjusted Book Value of Company Allocable to the Repurchase Right Per Unit Percentage of adjusted book value of the Company allocable to limited partnership units for purposes of calculating the repurchase price pursuant to the Company's annual Repurchase Right. eepl_PercentageOfMaximumUnitsToBeRepurchased Maximum percentage of units to be repurchased Maximum percentage of limited partnership units to be repurchased between May 1 and June 30 each year pursuant to the Company's annual Repurchase Right. eepl_MinimumPercentageOfOutstandingUnitsTenderedToUseProratedMethodForCalculatingActualNumberOfUnitsAcquired Minimum Percentage of Outstanding Units Tendered to Use Prorated Method for Calculating Actual Number of Units Acquired Minimum percentage of tendered outstanding limited partnership units required to use the prorated method for calculating the actual number of limited partnership units to be acquired during the repurchase right period pursuant to the Company's annual Repurchase Right. REVENUES dei_EntityAddressAddressLine2 Entity Address, Address Line Two dei_EntityAddressStateOrProvince Entity Address, State or Province dei_EntityAddressCityOrTown Entity Address, City or Town Statement of Partners' Capital [Abstract] eepl_NetRepurchasePriceOfPartnerUnit Net Repurchase Price of Partner Unit Net price paid or to be paid per limited partnership unit for limited partnership units repurchased pursuant to the Company's annual Repurchase Right. dei_EntityAddressAddressLine1 Entity Address, Address Line One Statement of Cash Flows [Abstract] dei_CityAreaCode City Area Code dei_LocalPhoneNumber Local Phone Number dei_EntityAddressPostalZipCode Entity Address, Postal Zip Code Equity Components [Axis] Class of Stock [Axis] Equity Component [Domain] dei_EntityCommonStockSharesOutstanding Entity Common Stock, Shares Outstanding (in shares) Well management and operating us-gaap_OtherAssetsCurrent Other us-gaap_PropertyPlantAndEquipmentNet Net property and equipment us-gaap_PropertyPlantAndEquipmentGross Gross property and equipment Subsequent Event Type [Domain] Proved properties (successful efforts accounting method) Subsequent Event Type [Axis] Pipeline and support equipment General Partner Proceeds from sale of investments Limited Partners Allocation of Partnership Net Income: Subsidiary or Equity Method Investee, Sale of Stock [Table] Basis of Accounting, Policy [Policy Text Block] Supplier Finance Program [Table] eepl_PolicyTable us-gaap_Assets TOTAL ASSETS Cash and Cash Equivalents, Policy [Policy Text Block] srt_OilAndGasDeliveryCommitmentsAndContractsSignificantSuppliesDedicatedOrContractedToEntity Oil and Gas, Delivery Commitment, Supply Dedicated or Contracted, Number Cash and equivalents Accounts Payable and Accrued Liabilities Disclosure [Text Block] us-gaap_PartnersCapitalAccountUnitsTreasury Partners' Capital Account, Units, Treasury Units Purchased (in shares) Operational Advances [Policy Text Block] Disclosure of accounting policy for operational advances, which are funds collected from joint venture partners for their anticipated share of future plugging and abandonment costs. CURRENT LIABILITIES Investment income us-gaap_LiabilitiesCurrent Total current liabilities OPERATIONAL ADVANCES Contract with Customer, Liability, Noncurrent us-gaap_PaymentsForProceedsFromAvailableforsaleSecuritiesShortterm Purchase of investments Revenue from Contract with Customer [Policy Text Block] eepl_CashAndCashEquivalentsMaturityPeriod Cash and Equivalents Maturity Period (Month) Maximum number of original maturity days from highly liquid debt instruments purchased in order for the instruments to be considered as cash and equivalents. Production accounts receivable Depreciation, depletion and amortization us-gaap_DepreciationDepletionAndAmortization Consolidation, Policy [Policy Text Block] Partner Type [Axis] us-gaap_PartnersCapital Total partners' equity PARTNERS' EQUITY - BEGINNING OF PERIOD PARTNERS' EQUITY - END OF PERIOD Net income per Unit (in dollars per share) Oil and Gas Service [Member] Gain (loss) on disposal of property and equipment (Gain) loss on disposal of property and equipment Other Commitments [Table] Less accumulated depreciation, depletion, amortization and write down us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest Partners' Capital Account, Distribution Per Unit of Limited Partner Interest Oil and Gas [Member] Partner Type of Partners' Capital Account, Name [Domain] GENERAL AND ADMINISTRATIVE EXPENSE Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Operational advances Partners' Capital Notes Disclosure [Text Block] us-gaap_PaymentsToAcquireOilAndGasPropertyAndEquipment Purchase of property and equipment Segment Reporting, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] CURRENT ASSETS GENERAL PARTNER'S EQUITY us-gaap_AssetsCurrent Total current assets ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] Total revenues ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Commitments and Contingencies