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| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | Promotion of and the continued growth and development of the library. Ensuring the library can continue to provide literary services and resources to the community. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 927 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 927 |
| IRS990/AllOtherContributionsAmt | 0 | 6314 |
| IRS990/BackupWthldComplianceInd | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | Lavonne Miller |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6053808627 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 215 SE 4th Avenue |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | Aberdeen |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | SD |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 57401 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 125371 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 84578 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
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| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 320 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 0 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContriRptFundraisingEventAmt | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 6314 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 315850 |
| IRS990/CYInvestmentIncomeAmt | 0 | 9783 |
| IRS990/CYOtherExpensesAmt | 0 | 6972 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -306725 |
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| IRS990/CYTotalExpensesAmt | 0 | 322822 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 16097 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | On an annual basis the library foundation applies for technology grant from 3M to be used for the children's programs to promote technology and science. The library director provides a list of educational materials to the foundation for purchasing to promote creative thinking for the young children's program. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 0 |
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| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 0 |
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| IRS990/ExpenseAmt | 0 | 2613 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FederatedCampaignsAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 2158 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 2158 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 0.5 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 0.5 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 0.5 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 0.5 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | 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/PersonNm | 0 | Ken Krause |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Melissa Francom |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Paul McDonald |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Patrick Gallagher |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | Troy McQuillen |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Lavonne Miller |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Jessica Faulken |
| 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/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/TitleTxt | 0 | Vice President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | board liasion |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | board member |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | board member |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | Secretary |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1994 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/FundraisingAmt | 0 | 0 |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | -2797 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 6 |
| IRS990/GovernmentGrantsAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 315850 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 315850 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 342850 |
| IRS990/GrossReceiptsAmt | 0 | 361744 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/ExclusionAmt | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 6 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 2613 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 2613 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 436 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 436 |
| IRS990/InvestmentExpenseAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/RelatedOrExemptFuncIncomeAmt | 0 | 12580 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 12580 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 377992 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 518784 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | SD |
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| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 345647 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | The promotion of the library and to promote the continued growth of the library. We support the general welfare and public relations as well as the increase the holdings of the library and improvements to the library so the library can continue to be a valuable resource for the community. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1351348 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1074041 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 0 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | -2797 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | -2797 |
| IRS990/NetGainOrLossInvestmentsGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 28994 |
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| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1074041 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NoncashContributionsAmt | 0 | 0 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 253 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 253 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | Meal and treats for library staff |
| IRS990/OtherExpensesGrp/Desc | 1 | Credit Card Fees |
| IRS990/OtherExpensesGrp/Desc | 2 | Filing fees |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 202 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 5 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 58 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 202 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 5 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 58 |
| IRS990/OtherRevenueTotalAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 847326 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 470224 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 659 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 455 |
| IRS990/PrincipalOfficerNm | 0 | Lavonne Miller |
| IRS990/PriorPeriodAdjustmentsAmt | 0 | 424 |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | In 2016 the foundation started a campaign to raise 2.1 million to be used toward the building of a new library building. Fundraising was wrapped up in 2017. The foundation is now currently making annual contributions to the City of Aberdeen who owns the library. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 315850 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 0 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | none |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 0 |
| IRS990/ProgSrvcAccomActy3Grp/RevenueAmt | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 8233 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 304697 |
| IRS990/PYInvestmentIncomeAmt | 0 | 16374 |
| IRS990/PYOtherExpensesAmt | 0 | 43240 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -323330 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/PYTotalExpensesAmt | 0 | 347937 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 24607 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -306725 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/RelatedOrganizationsAmt | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/PersonalAmt | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 0 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 2500 |
| IRS990/RoyaltiesRevenueGrp/ExclusionAmt | 0 | 0 |
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| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | K.O. Library |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 1 | 46-6000010 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 2 | 7 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | Schedule A, Part I, Line 12g(i) |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 1 | Schedule A, Part I, Line 12g(ii) |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 2 | Schedule A, Part I, Line 12g(iii) |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 6314 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 3233 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 1099010 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 711502 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 67355 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 1887414 |
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| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 16374 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 13497 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | -4407 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 20079 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 58123 |
| IRS990ScheduleA/OtherSupportSumAmt | 0 | 0 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.97012 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.94236 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 1887414 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsPY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 6314 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 3233 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 1099010 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 711502 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 67355 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 1887414 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 1945537 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | At this time the Board has not adopted a process to have the 990 reviewed. The 990 is prepared by a CPA who is on the board. The board is made up of professionals who volunteer their time. The board will continue to discuss the need to have the form reviewed by another CPA. The form is available to the board members for review. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | We currently do not have a formal conflict of interest policy. All governing documents and financial statements are held at the library in the directors office. The forms are available to the public upon their request. The board will discss the need to draft and implement a conflict interest policy. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | Changes in the net assets is the unrealized gain on the investments, the difference between cost and market. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | The pledge receivable was adjusted incorrectly in 2018 when adjusted for a formula error when compiling the pledges received. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Form 990, Part VI, Section B, Line 11b |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Form 990, Part VI, Section C, Line 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Form 990, Part IX, Line 5 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | Form 990, Part XI, Line 8 |
| IRS990/SchoolOperatingInd | 0 | 0 |
| IRS990/SignificantChangeInd | 0 | 0 |
| IRS990/SignificantNewProgramSrvcInd | 0 | 0 |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | 0 |
| IRS990/SubjectToProxyTaxInd | 0 | 0 |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | 0 |
| IRS990/TaxablePartyNotificationInd | 0 | 0 |
| IRS990/TaxExemptBondsInd | 0 | 0 |
| IRS990/TerminateOperationsInd | 0 | 0 |
| IRS990/TotalAssetsBOYAmt | 0 | 1351348 |
| IRS990/TotalAssetsEOYAmt | 0 | 1074041 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 1351348 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 1074041 |
| IRS990/TotalCompGreaterThan150KInd | 0 | 0 |
| IRS990/TotalContributionsAmt | 0 | 6314 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 4359 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 318463 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 322822 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 1351348 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 1074041 |
| IRS990/TotalOtherCompensationAmt | 0 | 0 |
| IRS990/TotalOtherProgSrvcExpenseAmt | 0 | 0 |
| IRS990/TotalOtherProgSrvcGrantAmt | 0 | 0 |
| IRS990/TotalOtherProgSrvcRevenueAmt | 0 | 0 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 318463 |
| IRS990/TotalProgramServiceRevenueAmt | 0 | 0 |
| IRS990/TotalReportableCompFromOrgAmt | 0 | 0 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 0 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 9783 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 16097 |
| IRS990/TotalRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/TotalVolunteersCnt | 0 | 6 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 1351348 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 1074041 |
| IRS990/TotReportableCompRltdOrgAmt | 0 | 0 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | 0 |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | 0 |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | 1010 S Penn St |
| IRS990/USAddress/CityNm | 0 | Aberdeen |
| IRS990/USAddress/StateAbbreviationCd | 0 | SD |
| IRS990/USAddress/ZIPCd | 0 | 57401 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 6 |
| IRS990/VotingMembersIndependentCnt | 0 | 6 |
| IRS990/WhistleblowerPolicyInd | 0 | 0 |
| ReturnHeader/BuildTS | 0 | 2021-01-29 14:40:06Z |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | Lavonne Miller |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | Treasurer |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 6053808627 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2020-07-12 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | ALEXANDER MITCHELL LIBRARY FOUNDATION |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | ALEX |
| ReturnHeader/Filer/EIN | 0 | 460428183 |
| ReturnHeader/Filer/PhoneNum | 0 | 6056267097 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 215 SE 4th Avenue |
| ReturnHeader/Filer/USAddress/CityNm | 0 | Aberdeen |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | SD |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 57401 |
| ReturnHeader/FilingSecurityInformation/IPAddress/IPv4AddressTxt | 0 | 24.111.122.197 |
| ReturnHeader/ReturnTs | 0 | 2020-07-14T22:07:21-07:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2019-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2019-12-31 |
| ReturnHeader/TaxYr | 0 | 2019 |