| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 23581 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 51318 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 1071 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 231 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | EPI OFFERS HANDS-ON SCIENCE EDUCATION, CONSERVATION IMPACT, AND CULTURAL EXCHANGE OPPORTUNITIES. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 315 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 1797 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 4548 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 6660 |
| IRS990/AllOtherContributionsAmt | 0 | 611858 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 801 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 16428 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 21801 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 39030 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | JOHN B WARREN |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4067218784 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 315 S 4TH STREET E |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | MISSOULA |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MT |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 59801 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 1237583 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 1124585 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 26658 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 10906 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 16920 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 54484 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CostOfGoodsSoldAmt | 0 | 391 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 796621 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 8512 |
| IRS990/CYOtherExpensesAmt | 0 | 699136 |
| IRS990/CYOtherRevenueAmt | 0 | 35371 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 21670 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -511992 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 675030 |
| IRS990/CYTotalExpensesAmt | 0 | 1374166 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 88785 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 862174 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 778863 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 1251495 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 292 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 27906 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 38727 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 66925 |
| IRS990/Desc | 0 | MEXICO - EPI PARTICIPANTS MONITOR WHALE ACTIVITY IN THE SEA OF CORTEZ, COLLECT DATA ON GREEN SEA TURTLES IN MAGDALENA BAY, AND STUDY ISLAND AND INLAND ECOLOGY BOTH ON LAND AND IN THE SURROUNDING WATERS OF ESPIRITU SANTO ISLAND. EPI OPERATES A CAMPUS IN LA PAZ HOSTING VISITING AND LOCAL STUDENTS THROUGHOUT THE YEAR. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1091053 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1070231 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 42 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 350373 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 172 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 9258 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 9430 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 12 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 645 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 657 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 4002 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 214890 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 218892 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignCountryCd | 0 | BH |
| IRS990/ForeignCountryCd | 1 | CS |
| IRS990/ForeignCountryCd | 2 | EC |
| IRS990/ForeignCountryCd | 3 | MX |
| IRS990/ForeignFinancialAccountInd | 0 | 1 |
| IRS990/ForeignOfficeInd | 0 | 1 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 14 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 2784 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 4678 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | AARON HIRSH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | LYNN PRICE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | TRENT BAKER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | STEVE ANDERSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | LAURA IZA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | CHARLES HOLMES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MAUREEN ELDREDGE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | JULIE OSBORN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | SI WHITE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | NICOLE-ANNE BOYER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | DAVID WILSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | MIKE DEN HAAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | BECCA SCHULTZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | PAUL SHORE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | T'NOYA THOMPSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | JOHN BRANT WARREN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | STEPHEN SIMPSON |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 92809 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 62679 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | EXECUTIVE DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | FINANCE DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/FormationYr | 0 | 2001 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 5678 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 15 |
| IRS990/GovernmentGrantsAmt | 0 | 184763 |
| IRS990/GrantsPayableGrp/BOYAmt | 0 | 480684 |
| IRS990/GrantsPayableGrp/EOYAmt | 0 | 480684 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 5678 |
| IRS990/GrossReceiptsAmt | 0 | 862565 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 21118 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 1162 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 15 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 4769 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 7118 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 12528 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 24415 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 9578 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 4262 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 13840 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 2834 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 2834 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 149957 |
| IRS990/IRPDocumentCnt | 0 | 2 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 697518 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 1492811 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 1425886 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 2123404 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 0 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | ECOLOGY PROJECT INTERNATIONAL'S MISSION IS TO IMPROVE AND INSPIRE SCIENCE EDUCATION AND CONSERVATION EFFORTS WORLDWIDE THROUGH FIELD-BASED STUDENT-SCIENTIST PARTNERSHIPS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 426339 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 404352 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 2418240 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1906248 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 5678 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 5678 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 771 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 771 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 21118 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 21118 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1327187 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 836017 |
| IRS990/NoncashContributionsAmt | 0 | 130271 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 4890 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 29431 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 34321 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 1314 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 1543 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 3152 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 6009 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 5588 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 5588 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 5497 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 10251 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 34001 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 49749 |
| IRS990/OtherExpensesGrp/Desc | 0 | PARTICIPANT EXPENSE |
| IRS990/OtherExpensesGrp/Desc | 1 | BAD DEBT |
| IRS990/OtherExpensesGrp/Desc | 2 | MISCELLANEOUS |
| IRS990/OtherExpensesGrp/Desc | 3 | MATERIALS & EQUIPMENT |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 496 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 3418 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 171420 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 61982 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 20513 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 21128 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 171420 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 61982 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 24427 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 21128 |
| IRS990/OtherInd | 0 | X |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 16588 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 16588 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 1 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 2 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | CREDIT CARD FEES |
| IRS990/OtherRevenueMiscGrp/Desc | 1 | MISCELLANEOUS REVENUE |
| IRS990/OtherRevenueMiscGrp/Desc | 2 | FOREIGN CURRENCY EXCHA |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 9379 |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 1 | 4254 |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 2 | -151 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 9379 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 1 | 4254 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 2 | -151 |
| IRS990/OtherRevenueTotalAmt | 0 | 13482 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 41298 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 105205 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 362931 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 509434 |
| IRS990/OwnWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 6809 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 11714 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 38365 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 56888 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 536 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 921 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 3018 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 4475 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 1301526 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 1127528 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 6363 |
| IRS990/PrincipalOfficerNm | 0 | JOHN B WARREN |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611600 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 611600 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | THIRD PARTY VISITORS |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | TUITION |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 18445 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 3225 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 18445 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 3225 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | ECUADOR - IN THE GALAPAGOS, EPI PARTNERS WITH GALAPAGOS NATIONAL PARK SERVICE TO ENGAGE PARTICIPANTS IN CONSERVATION AND RESEARCH ON THE GIANT GALAPAGOS TORTOISE AND HABITAT RESTORATION. ON THE MAINLAND, EPI SUPPORTS SPECTACLED BEAR AND AMAZON JUNGLE RESEARCH AND CONSERVATION. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 325305 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 10926 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | PACUARE RESERVE, COSTA RICA - EPI MANAGES A 2,600-ACRE COASTAL LOWLAND RAINFOREST RESERVE THAT CONTAINS A RESEARCH STATION, LODGING FOR STAFF, STUDENTS, AND VISITORS, TRAILS, AND 5 KILOMETERS OF CRITICAL SEA TURTLE NESTING HABITAT. |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 148662 |
| IRS990/ProgSrvcAccomActy3Grp/RevenueAmt | 0 | 4993 |
| IRS990/ProgSrvcAccomActyOtherGrp/Desc | 0 | YELLOWSTONE ECOSYSTEM, USA - EPI PARTNERS WITH FEDERAL AGENCIES DURING WINTER AND SUMMER COURSES COLLECTING DATA ON BISON, COUGARS, AND UNGULATES; MONITOR LOCAL WOLF POPULATIONS; AND CONDUCT BEAR SAFETY STUDIES. |
| IRS990/ProgSrvcAccomActyOtherGrp/Desc | 1 | COSTA RICA - EPI OFFERS A VARIETY OF FIELD-BASED EDUCATIONAL PROGRAMS FOR INTERNATIONAL AND LOCAL YOUTH, AS WELL AS LOCAL IN-SCHOOL EDUCATIONAL PROGRAMMING THROUGHOUT THE COUNTRY WITH A FOCUS ON THE CENTRAL VALLEY CARIBBEAN COAST COMMUNITIES. |
| IRS990/ProgSrvcAccomActyOtherGrp/Desc | 2 | BELIZE - EPI ENGAGES STUDENTS IN MARINE AND TERRESTRIAL ECOLOGY ACTIVITIES ALONG THE BARRIER REEF AND THE COCKSCOMB BASIN WILDLIFE SANCTUARY TO STUDY MAYAN CULTURE, JUNGLE ECOLOGY, AND COLLECT DATA ON NATIVE BIRDS AND JAGUARS. |
| IRS990/ProgSrvcAccomActyOtherGrp/Desc | 3 | HAWAII - EPI OFFERS A COMPREHENSIVE TERRESTRIAL AND MARINE RIDGE TO REEF CONSERVATION EDUCATION PROGRAM WITH REEF FISH SURVEYS, WATER QUALITY TESTING, AND RESTORATION OF CULTURAL FARMING PRACTICES. IN HAWAII, EPI WORKS IN HAWAII'S VALLEY ISLE IN MAUI TO HELP STUDENTS LEARN ABOUT HAWAII'S NATURAL WONDERS, VIBRANT WILDLIFE, AND A GROWING HUMAN POPULATION ON AN ISLAND ECOSYSTEM. |
| IRS990/ProgSrvcAccomActyOtherGrp/ExpenseAmt | 0 | 136119 |
| IRS990/ProgSrvcAccomActyOtherGrp/ExpenseAmt | 1 | 100949 |
| IRS990/ProgSrvcAccomActyOtherGrp/ExpenseAmt | 2 | 4814 |
| IRS990/ProgSrvcAccomActyOtherGrp/ExpenseAmt | 3 | 3298 |
| IRS990/ProgSrvcAccomActyOtherGrp/RevenueAmt | 0 | 4572 |
| IRS990/ProgSrvcAccomActyOtherGrp/RevenueAmt | 1 | 3391 |
| IRS990/ProgSrvcAccomActyOtherGrp/RevenueAmt | 2 | 162 |
| IRS990/ProgSrvcAccomActyOtherGrp/RevenueAmt | 3 | 111 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 3110673 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 737 |
| IRS990/PYInvestmentIncomeAmt | 0 | 13150 |
| IRS990/PYOtherExpensesAmt | 0 | 1143747 |
| IRS990/PYOtherRevenueAmt | 0 | 67717 |