| IRS990EZ/ActivitiesNotPreviouslyRptInd | 0 | 0 |
| IRS990EZ/BenefitsPaidToOrForMembersAmt | 0 | 0 |
| IRS990EZ/BooksInCareOfDetail/PersonNm | 0 | JANE GANAHL |
| IRS990EZ/BooksInCareOfDetail/PhoneNum | 0 | 4152351160 |
| IRS990EZ/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 8 PATRICK WAY |
| IRS990EZ/BooksInCareOfDetail/USAddress/CityNm | 0 | HALF MOON BAY |
| IRS990EZ/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990EZ/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94019 |
| IRS990EZ/CashSavingsAndInvestmentsGrp/BOYAmt | 0 | 9608 |
| IRS990EZ/CashSavingsAndInvestmentsGrp/EOYAmt | 0 | 11509 |
| IRS990EZ/ChgMadeToOrgnzngDocNotRptInd | 0 | 0 |
| IRS990EZ/ContributionsGiftsGrantsEtcAmt | 0 | 68319 |
| IRS990EZ/CostOfGoodsSoldAmt | 0 | 0 |
| IRS990EZ/CostOrOtherBasisExpenseSaleAmt | 0 | 0 |
| IRS990EZ/DirectIndirectPltclExpendAmt | 0 | 0 |
| IRS990EZ/DonorAdvisedFndsInd | 0 | 0 |
| IRS990EZ/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990EZ/ExcessOrDeficitForYearAmt | 0 | 1901 |
| IRS990EZ/FeesAndOtherPymtToIndCntrctAmt | 0 | 0 |
| IRS990EZ/FiledScheduleAInd | 0 | 1 |
| IRS990EZ/ForeignFinancialAccountInd | 0 | 0 |
| IRS990EZ/ForeignOfficeInd | 0 | 0 |
| IRS990EZ/Form1120PolFiledInd | 0 | 0 |
| IRS990EZ/Form990TotalAssetsGrp/BOYAmt | 0 | 9608 |
| IRS990EZ/Form990TotalAssetsGrp/EOYAmt | 0 | 11509 |
| IRS990EZ/FundraisingGrossIncomeAmt | 0 | 0 |
| IRS990EZ/GainOrLossFromSaleOfAssetsAmt | 0 | 0 |
| IRS990EZ/GamingGrossIncomeAmt | 0 | 0 |
| IRS990EZ/GrantsAndSimilarAmountsPaidAmt | 0 | 0 |
| IRS990EZ/GrossProfitLossSlsOfInvntryAmt | 0 | 0 |
| IRS990EZ/GrossReceiptsAmt | 0 | 73277 |
| IRS990EZ/GrossSalesOfInventoryAmt | 0 | 0 |
| IRS990EZ/InfoInScheduleOPartIInd | 0 | X |
| IRS990EZ/InvestmentIncomeAmt | 0 | 0 |
| IRS990EZ/LandAndBuildingsGrp/BOYAmt | 0 | 0 |
| IRS990EZ/LandAndBuildingsGrp/EOYAmt | 0 | 0 |
| IRS990EZ/LobbyingActivitiesInd | 0 | 0 |
| IRS990EZ/MadeLoansToFromOfficersInd | 0 | 0 |
| IRS990EZ/MembershipDuesAmt | 0 | 0 |
| IRS990EZ/MethodOfAccountingCashInd | 0 | X |
| IRS990EZ/NetAssetsOrFundBalancesBOYAmt | 0 | 9608 |
| IRS990EZ/NetAssetsOrFundBalancesEOYAmt | 0 | 11509 |
| IRS990EZ/NetAssetsOrFundBalancesGrp/BOYAmt | 0 | 9608 |
| IRS990EZ/NetAssetsOrFundBalancesGrp/EOYAmt | 0 | 11509 |
| IRS990EZ/OccupancyRentUtltsAndMaintAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 0 | 30 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 1 | 10 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 2 | 2 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 3 | 4 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 1 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 1 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 1 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 0 | JANE GANAHL |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 1 | SANDY KELLY |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 2 | JEAN KNIGHT |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 3 | KRYSTINA CROWLEY |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 4 | STEPHEN JACOBSON |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 0 | CEO |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 1 | SECRETARY, DIRECTOR |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 2 | DIRECTOR |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 3 | DIRECTOR |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 4 | CFO (FOR PURPOSE OF FILING REQUIRED FORMS ONLY) |
| IRS990EZ/OperateHospitalInd | 0 | 0 |
| IRS990EZ/Organization501c3Ind | 0 | X |
| IRS990EZ/OrganizationDissolvedEtcInd | 0 | 0 |
| IRS990EZ/OrganizationHadUBIInd | 0 | 0 |
| IRS990EZ/OtherAssetsTotalDetail/BOYAmt | 0 | 0 |
| IRS990EZ/OtherAssetsTotalDetail/EOYAmt | 0 | 0 |
| IRS990EZ/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990EZ/OtherExpensesTotalAmt | 0 | 71376 |
| IRS990EZ/OtherRevenueTotalAmt | 0 | 4958 |
| IRS990EZ/PartVIHghstPdCntrctProfSrvcTxt | 0 | NONE |
| IRS990EZ/PartVIOfCompOfHghstPdEmplTxt | 0 | NONE |
| IRS990EZ/PoliticalCampaignActyInd | 0 | 0 |
| IRS990EZ/PrimaryExemptPurposeTxt | 0 | Provide food and care for homeless community cats |
| IRS990EZ/PrintingPublicationsPostageAmt | 0 | 0 |
| IRS990EZ/ProgramServiceRevenueAmt | 0 | 0 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt | 0 | COASTSIDE FERAL CARE PROVIDES FOOD, CARE, HOUSING AND OTHER SUPPORT SERVICES FOR HOMELESS COMMUNITY CATS IN HALF MOON BAY, CALIFORNIA. NO COMPENSATION IS PAID. ALL FUNDS RAISED ARE USED TO BUY CAT FOOD AND MEDICAL CARE. |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/GrantsAndAllocationsAmt | 0 | 73277 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/ProgramServiceExpensesAmt | 0 | 71376 |
| IRS990EZ/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990EZ/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990EZ/SalariesOtherCompEmplBnftAmt | 0 | 0 |
| IRS990EZ/SaleOfAssetsGrossAmt | 0 | 0 |
| IRS990EZ/ScheduleBNotRequiredInd | 0 | X |
| IRS990EZ/SchoolOperatingInd | 0 | 0 |
| IRS990EZ/SpecialEventsDirectExpensesAmt | 0 | 0 |
| IRS990EZ/SpecialEventsNetIncomeLossAmt | 0 | 0 |
| IRS990EZ/StatesWhereCopyOfReturnIsFldCd | 0 | CA |
| IRS990EZ/SubjectToProxyTaxInd | 0 | 0 |
| IRS990EZ/SumOfTotalLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990EZ/SumOfTotalLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990EZ/TanningServicesProvidedInd | 0 | 0 |
| IRS990EZ/TaxImposedOnOrganizationMgrAmt | 0 | 0 |
| IRS990EZ/TaxImposedUnderIRC4911Amt | 0 | 0 |
| IRS990EZ/TaxImposedUnderIRC4912Amt | 0 | 0 |
| IRS990EZ/TaxImposedUnderIRC4955Amt | 0 | 0 |
| IRS990EZ/TaxReimbursedByOrganizationAmt | 0 | 0 |
| IRS990EZ/TotalExpensesAmt | 0 | 71376 |
| IRS990EZ/TotalProgramServiceExpensesAmt | 0 | 71376 |
| IRS990EZ/TotalRevenueAmt | 0 | 73277 |
| IRS990EZ/TransactionWithControlEntInd | 0 | 0 |
| IRS990EZ/TrnsfrExmptNonChrtblRltdOrgInd | 0 | 0 |
| IRS990EZ/TypeOfOrganizationCorpInd | 0 | X |
| IRS990EZ/WebsiteAddressTxt | 0 | COASTSIDEFERALCARE.ORG |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 73277 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 44115 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 40739 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 39054 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 51301 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 248486 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.84601 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.7221 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 210221 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 38265 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsPY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 73277 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 44115 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 40739 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 39054 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 51301 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 248486 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 248486 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | COASTSIDE FERAL CARE PROVIDES FOOD, CARE, HOUSING AND OTHER SUPPORT SERVICES FOR HOMELESS COMMUNITY CATS. WE ARE A SMALL VOLUNTEER GROUP THAT DEPENDS ON LOCAL CONTRIBUTIONS OF CASH AND DONATED FOOD TO CARE FOR CATS IN SEVERAL COLONIES. NO ONE RECEIVES COMPENSATION. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | Donated cat food |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | Description;Amount^Cat food;38394|Medical bills;30378|Supplies;1202|Marketing;1402^Total;71376^ |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Form 990-EZ, Header, Line A |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Form 990-EZ, Part I, Line 8 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Form 990-EZ, Part I, Line 16 |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | STEVE JACOBSON |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | CFO |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 6508682377 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-03-06 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | COASTSIDE FERAL CARE |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | COAS |
| ReturnHeader/Filer/EIN | 0 | 474082624 |
| ReturnHeader/Filer/PhoneNum | 0 | 4152351160 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 8 PATRICK WAY |
| ReturnHeader/Filer/USAddress/CityNm | 0 | HALF MOON BAY |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | CA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 94019 |
| ReturnHeader/IRSResponsiblePrtyInfoCurrInd | 0 | 1 |
| ReturnHeader/ReturnTs | 0 | 2025-03-12T15:11:01-07:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990EZ |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2024-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2024-12-31 |
| ReturnHeader/TaxYr | 0 | 2024 |