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| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 1788 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | FOUNDED IN BRONX, NY, START LIGHTHOUSE IS A 501(C)3 NONPROFIT DEDICATED TO ADVANCING CHILDHOOD LITERACY THROUGH A SOCIAL JUSTICE LENSE. START LIGHTHOUSE ADDRESSES THE LITERACY CRISIS WITH A THREE-PRONGED APPROACH TO CREATE COMPELLING, REWARDING READING PROGRAMS FOR STUDENTS, THEIR TEACHERS, AND THEIR FAMILIES. |
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| IRS990/AdvertisingGrp/TotalAmt | 0 | 1616 |
| IRS990/AllOtherContributionsAmt | 0 | 432829 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 50685 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 50685 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 0 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | RINA MADHANI |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4437424473 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 229 WEST 116TH STREET APT 5 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | NEW YORK |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | NY |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 10026 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
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| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 577545 |
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| IRS990/CollectionsOfArtInd | 0 | 0 |
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| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
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| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 977 |
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| IRS990/CYProgramServiceRevenueAmt | 0 | 128100 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 12048 |
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| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
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| IRS990/EscrowAccountInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 46642 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditPerformedInd | 0 | 1 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
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| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 10358 |
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| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 125 |
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| IRS990/ForeignCountryCd | 0 | AF |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form1098CFiledInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form8886TFiledInd | 0 | 0 |
| IRS990/Form8899Filedind | 0 | 0 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 005.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 001.00 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 001.00 |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
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| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | OFFICER |
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| IRS990/Form990TFiledInd | 0 | 0 |
| IRS990/FormationYr | 0 | 2020 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
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| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
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| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVInd | 0 | X |
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| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 275 |
| IRS990/InitialReturnInd | 0 | X |
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| IRS990/InsuranceGrp/TotalAmt | 0 | 4075 |
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| IRS990/IRPDocumentW2GCnt | 0 | 0 |
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| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 0 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 0 |
| IRS990/MissionDesc | 0 | FOUNDED NBSP;IN NBSP;BRONX NBSP;NY NBSP;START NBSP;LIGHTHOUSE NBSP;IS NBSP;A NBSP;501(C)3 NBSP;NONPROFIT NBSP;DEDICATED NBSP;TO NBSP;ADVANCING NBSP;CHILDHOOD NBSP;LITERACY NBSP;THROUGH NBSP;A NBSP;SOCIAL NBSP;JUSTICE NBSP;LENSE NBSP;START NBSP;LIGHTHOUSE NBSP;ADDRESSES NBSP;THE NBSP;LITERACY NBSP;CRISIS NBSP;WITH NBSP;A NBSP;THREE-PRONGED NBSP;APPROACH NBSP;TO NBSP;CREATE NBSP;COMPELLING NBSP;REWARDING NBSP;READING NBSP;PROGRAMS |
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| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 4050 |
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| IRS990/OnBehalfOfIssuerInd | 0 | 0 |
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| IRS990/OtherExpensesGrp/Desc | 3 | AUTHOR HONORARIUM |
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| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 28 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 105 |
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| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 33014 |
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| IRS990/PrincipalOfficerNm | 0 | ALISON SCHWARTZ |
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| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus3YearsAmt | 0 | 35771 |
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| IRS990ScheduleA/InvestmentIncomePYPct | 0 | 0.00000 |
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| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0.97830 |
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| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 1619603 |
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| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 35771 |
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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | FOUNDED IN BRONX, NY, START LIGHTHOUSE IS A 501(C)3 NONPROFIT DEDICATED TO ADVANCING CHILDHOOD LITERACY THROUGH A SOCIAL JUSTICE LENSE. START LIGHTHOUSE ADDRESSES THE LITERACY CRISIS WITH A THREE-PRONGED APPROACH TO CREATE COMPELLING, REWARDING READING PROGRAMS |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART V, LINE 3B |
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| IRS990/SignificantNewProgramSrvcInd | 0 | 0 |
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| IRS990/SubjectToProxyTaxInd | 0 | 0 |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | 0 |
| IRS990/TaxableDistributionsInd | 0 | 0 |
| IRS990/TaxablePartyNotificationInd | 0 | 0 |
| IRS990/TaxExemptBondsInd | 0 | 0 |
| IRS990/TerminateOperationsInd | 0 | 0 |
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| IRS990/TotalAssetsGrp/EOYAmt | 0 | 577545 |
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| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 401360 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 548881 |
| IRS990/TotalGrossUBIAmt | 0 | 72 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 1788 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 14579 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 1788 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 14579 |
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| IRS990/TotalProgramServiceRevenueAmt | 0 | 128100 |
| IRS990/TotalReportableCompFromOrgAmt | 0 | 99716 |
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| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 577545 |
| IRS990/TransactionWithControlEntInd | 0 | 0 |
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| IRS990/TravelGrp/TotalAmt | 0 | 4332 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | 0 |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | 0 |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | 5A 229 WEST 116TH ST |
| IRS990/USAddress/CityNm | 0 | NEW YORK |
| IRS990/USAddress/StateAbbreviationCd | 0 | NY |
| IRS990/USAddress/ZIPCd | 0 | 10026 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 4 |
| IRS990/VotingMembersIndependentCnt | 0 | 0 |
| IRS990/WhistleblowerPolicyInd | 0 | 0 |
| IRS990/WrittenPolicyOrProcedureInd | 0 | 0 |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | 1 |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | ALISON SCHWARTZ |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | PRESIDENT |
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| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-04-14 |
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| ReturnHeader/Filer/BusinessNameControlTxt | 0 | STAR |
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| ReturnHeader/Filer/PhoneNum | 0 | 8645594347 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 234 10TH AVE 20603 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | NEW YORK |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | NY |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 10011 |
| ReturnHeader/IRSResponsiblePrtyInfoCurrInd | 0 | 1 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmEIN | 0 | 863697201 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | RICHARDSON BOOKKEEPING LLC |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 2002 NORTHLAKE DR |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | Anderson |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | SC |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 29625 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 8645021618 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | ISA L RICHARDSON |
| ReturnHeader/PreparerPersonGrp/SelfEmployedInd | 0 | X |
| ReturnHeader/ReturnTs | 0 | 2025-04-14T13:50:49-05:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2024-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2024-12-31 |
| ReturnHeader/TaxYr | 0 | 2024 |