Liabilities / Assets
20th percentile
Higher debt load relative to assets than 20% of similar nonprofits.
EIN 01-6016566 • 501(c)3 • North Haven, ME
Profile
Operation of Library
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
20th percentile
Higher debt load relative to assets than 20% of similar nonprofits.
Liabilities / Revenue
23rd percentile
Higher debt load relative to revenue than 23% of similar nonprofits.
Net Margin
96th percentile
Higher net margin than 96% of similar nonprofits.
Top Officer Pay
74th percentile
Higher top officer pay than 74% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
77th percentile
Faster asset growth than 77% of similar nonprofits.
Revenue Growth
8th percentile
Faster revenue growth than 8% of similar nonprofits.
Assets
Up$1,586,335
Up $214,470 (+16%) from 2024
Liabilities
Up$749
Up $22 (+3.0%) from 2024
Net Assets
Up$1,585,586
Up $214,448 (+16%) from 2024
Revenue
Up$257,286
Up $4,932 (+2.0%) from 2024
Expenses
Up$58,899
Up $1,144 (+2.0%) from 2024
Net Income
Up$198,387
Up $3,788 (+1.9%) from 2024
Most recent year
2025 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
OPERATION OF LIBRARY
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Rtn Earn Endowment Incm Other Fnds | $1,371,138 | $1,585,586 | ▲ $214,448 |
| Land, Buildings, and Equipment, Net | $433,513 | $1,166,839 | ▲ $733,326 |
| Investments in Publicly Traded Securities | $380,882 | $241,313 | ▼ $139,569 |
| Cash and Non-Interest-Bearing Accounts | $170,215 | $165,296 | ▼ $4,919 |
| Savings and Temporary Cash Investments | $387,255 | $12,887 | ▼ $374,368 |
| Total Assets | $1,371,865 | $1,586,335 | ▲ $214,470 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $727 | $749 | ▲ $22 |
| Total Liabilities | $727 | $749 | ▲ $22 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $1,371,138 | $1,585,586 | ▲ $214,448 |
| Total Liabilities and Net Assets / Fund Balance | $1,371,865 | $1,586,335 | ▲ $214,470 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $1,159,439 | $102,486 | $1,261,925 |
| Other Land Buildings | - | $28,200 | $28,200 |
| Land | $7,400 | - | $7,400 |
| Equipment | - | $6,163 | $6,163 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2024 | $426,577 | $173,902 | ▲ $10,668 | $591,069 | $20,078 |
| 2023 | $621,052 | $141,678 | - | $194,495 | $426,577 |
| 2022 | $72,969 | $548,083 | - | - | $621,052 |
| 2021 | - | $69,527 | ▲ $3,442 | - | $72,969 |
| Name | Title |
|---|---|
| David Wilson | President |
| Adam Alexander | Trustee |
| Alice Corhwell | Trustee |
| Amilia Campbell | Trustee |
| Eugene Pool | Trustee |
| Jean Lamont | Trustee |
| Jeannette Sanger | Trustee |
| Jennifer Winthrop | Trustee |
| Laura Serino | Trustee |
| Mary White | Trustee |
| Sarah Whinery | Trustee |
| Susan Minot | Secretary |
| Ed Hayes | Treasurer |
| Contribution Type | Contribution Count | Reported Amount |
|---|---|---|
| Securities Publicly Traded | 10 | $121,594 |
| Total Noncash Contributions | 10 | $121,594 |
| Line Item | Amount |
|---|---|
| Other Expenses | $32,648 |
| Salaries, Compensation, and Employee Benefits | $26,251 |
| Total Fundraising Expense | $1,260 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $24,320 | - | - | $24,320 |
| Fees for Services Accounting | $5,458 | $6,233 | $774 | $12,465 |
| Occupancy | $8,811 | - | $145 | $8,956 |
| Insurance | $4,167 | - | - | $4,167 |
| Depreciation Depletion | $3,634 | - | - | $3,634 |
| Payroll Taxes | $1,931 | - | - | $1,931 |
| Information Technology | $841 | $842 | - | $1,683 |
| Office Expenses | $754 | - | $341 | $1,095 |
| Other Expenses | $648 | - | - | $648 |
| Total Functional Expenses | $50,564 | $7,075 | $1,260 | $58,899 |
| Line Item | Amount |
|---|---|
| Fundraising Direct Expenses | $4,295 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Winter&summer F | $67,849 | - | $4,295 | - |
| Total Events | $67,849 | - | $4,295 | $-4,295 |
“Form 990 is reviewed and approved by the organization's treasurer prior to filing. The treasurer provides copies to all board members as required.”
“Copies of the organization's forms 990 are available to the public upon request. Other governing and financial documents are not available.”
“Operation of the library for the benefit of north haven residents and visitors to the island.”
“Most of the restricted funds are donor-restricted for library renovations which are scheduled to take place during the 2024-2025 fiscal year. There are 2 smaller donor-restricted funds, also temporarily-restricted: one to be used for purchase and installation of new heat pumps for the renovated building; the other to be used to purchase new childrens books.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
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| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 727 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 749 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | OPERATION OF LIBRARY |
| IRS990/AllOtherContributionsAmt | 0 | 167076 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | ED HAYES |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6178756949 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | PO BOX 419 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | NORTH HAVEN |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | ME |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 04843 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 170215 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 165296 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConflictOfInterestPolicyInd | 0 | false |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContriRptFundraisingEventAmt | 0 | 67849 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 234925 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 26656 |
| IRS990/CYOtherExpensesAmt | 0 | 32648 |
| IRS990/CYOtherRevenueAmt | 0 | -4295 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 198387 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 26251 |
| IRS990/CYTotalExpensesAmt | 0 | 58899 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1260 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 257286 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | true |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 3634 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 3634 |
| IRS990/Desc | 0 | OPERATION OF THE LIBRARY FOR THE BENEFIT OF NORTH HAVEN ISLAND RESIDENTS AND VISITORS. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | true |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 1 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 50474 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 774 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 6233 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 5458 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 12465 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 8.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 2.00 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 3.00 |
| 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/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | SUSAN MINOT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ED HAYES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JEANNETTE SANGER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | EUGENE POOL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | SARAH WHINERY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | JEAN LAMONT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | ADAM ALEXANDER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | AMILIA CAMPBELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | ALICE CORHWELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | MARY WHITE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | LAURA SERINO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | JENNIFER WINTHROP |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 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 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | TRUSTEE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingAmt | 0 | 67849 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 4295 |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 10668 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 13 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 10668 |
| IRS990/GrossReceiptsAmt | 0 | 261581 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 13 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 842 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 841 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 1683 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 4167 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 4167 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 15988 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 15988 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 380882 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 241313 |
| IRS990/IRPDocumentCnt | 0 | 2 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 136849 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 433513 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 1166839 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 1303688 |
| IRS990/LegalDomicileStateCd | 0 | ME |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingCashInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | OPERATION OF LIBRARY |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1371138 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1585586 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 10668 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 10668 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | -4295 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | -4295 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 16061 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NoncashContributionsAmt | 0 | 121594 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 145 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 8811 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 8956 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 341 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 754 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 1095 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowFASB117Ind | 0 | X |
| IRS990/OtherExpensesGrp/Desc | 0 | BOOKS |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 648 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 648 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 24320 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 24320 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 1931 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 1931 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | DAVID WILSON |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgSrvcAccomActyOtherGrp/Desc | 0 | OPERATION OF THE LIBRARY FOR THE BENEFIT OF NORTH HAVEN RESIDENTS AND VISITORS TO THE ISLAND. |
| IRS990/ProgSrvcAccomActyOtherGrp/ExpenseAmt | 0 | 90 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 215009 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 37345 |
| IRS990/PYOtherExpensesAmt | 0 | 31575 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 194599 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 26180 |
| IRS990/PYTotalExpensesAmt | 0 | 57755 |
| IRS990/PYTotalRevenueAmt | 0 | 252354 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 198387 |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 1371138 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 1585586 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 387255 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 12887 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/CurrentTaxYearMinus1YearAmt | 0 | 10000 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/CurrentTaxYearMinus2YearsAmt | 0 | 175395 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/CurrentTaxYearMinus3YearsAmt | 0 | 73322 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/CurrentTaxYearMinus4YearsAmt | 0 | 8113 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/TotalAmt | 0 | 266830 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt | 0 | 234925 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt | 0 | 215009 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 584813 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 119722 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 70652 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt | 0 | 1225121 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearAmt | 0 | 15988 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus1YearAmt | 0 | 31912 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 18762 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 5747 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 9040 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/TotalAmt | 0 | 81449 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearAmt | 0 | 15988 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus1YearAmt | 0 | 31912 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus2YearsAmt | 0 | 18762 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus3YearsAmt | 0 | 5747 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus4YearsAmt | 0 | 9040 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/TotalAmt | 0 | 81449 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0.06000 |
| IRS990ScheduleA/InvestmentIncomePYPct | 0 | 0.06000 |
| IRS990ScheduleA/PubliclySupportedOrg509a2Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0.73340 |
| IRS990ScheduleA/PublicSupportPY509Pct | 0 | 0.68880 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 958291 |
| IRS990ScheduleA/SubstAndDsqlfyPrsnsTotGrp/CurrentTaxYearMinus1YearAmt | 0 | 10000 |
| IRS990ScheduleA/SubstAndDsqlfyPrsnsTotGrp/CurrentTaxYearMinus2YearsAmt | 0 | 175395 |
| IRS990ScheduleA/SubstAndDsqlfyPrsnsTotGrp/CurrentTaxYearMinus3YearsAmt | 0 | 73322 |
| IRS990ScheduleA/SubstAndDsqlfyPrsnsTotGrp/CurrentTaxYearMinus4YearsAmt | 0 | 8113 |
| IRS990ScheduleA/SubstAndDsqlfyPrsnsTotGrp/TotalAmt | 0 | 266830 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind | 0 | X |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearAmt | 0 | 234925 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt | 0 | 215009 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 584813 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 119722 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 70652 |
| IRS990ScheduleA/Total509Grp/TotalAmt | 0 | 1225121 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearAmt | 0 | 250913 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus1YearAmt | 0 | 246921 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus2YearsAmt | 0 | 603575 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus3YearsAmt | 0 | 125469 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus4YearsAmt | 0 | 79692 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/TotalAmt | 0 | 1306570 |
| 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 | true |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 1159439 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 102486 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 1261925 |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 426577 |
| IRS990ScheduleD/CYEndwmtFundGrp/ContributionsAmt | 0 | 173902 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 20078 |
| IRS990ScheduleD/CYEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 10668 |
| IRS990ScheduleD/CYEndwmtFundGrp/OtherExpendituresAmt | 0 | 591069 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 621052 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/ContributionsAmt | 0 | 141678 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 426577 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 194495 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 72969 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/ContributionsAmt | 0 | 548083 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 621052 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/ContributionsAmt | 0 | 69527 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 72969 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 3442 |
| IRS990ScheduleD/EndowmentsHeldRelatedOrgInd | 0 | false |
| IRS990ScheduleD/EndowmentsHeldUnrelatedOrgInd | 0 | false |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 6163 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 6163 |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 7400 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 7400 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 28200 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 28200 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | MOST OF THE RESTRICTED FUNDS ARE DONOR-RESTRICTED FOR LIBRARY RENOVATIONS WHICH ARE SCHEDULED TO TAKE PLACE DURING THE 2024-2025 FISCAL YEAR. THERE ARE 2 SMALLER DONOR-RESTRICTED FUNDS, ALSO TEMPORARILY-RESTRICTED: ONE TO BE USED FOR PURCHASE AND INSTALLATION OF NEW HEAT PUMPS FOR THE RENOVATED BUILDING; THE OTHER TO BE USED TO PURCHASE NEW CHILDRENS BOOKS. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE D, PAGE 2, PART V, LINE 4 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 1166839 |
| IRS990ScheduleG/FundraisingEventInformationGrp/CharitableContributionsTotAmt | 0 | 67849 |
| IRS990ScheduleG/FundraisingEventInformationGrp/CharitableContriEvent1Amt | 0 | 67849 |
| IRS990ScheduleG/FundraisingEventInformationGrp/DirectExpenseSummaryEventsAmt | 0 | 4295 |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event1Nm | 0 | WINTER&SUMMER F |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent1Amt | 0 | 67849 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsTotalAmt | 0 | 67849 |
| IRS990ScheduleG/FundraisingEventInformationGrp/NetIncomeSummaryAmt | 0 | -4295 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssTotalEventsAmt | 0 | 4295 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherDirectExpensesEvent1Amt | 0 | 4295 |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990ScheduleM/AnyPropertyThatMustBeHeldInd | 0 | false |
| IRS990ScheduleM/ReviewProcessUnusualNCGiftsInd | 0 | false |
| IRS990ScheduleM/SecuritiesPubliclyTradedGrp/ContributionCnt | 0 | 10 |
| IRS990ScheduleM/SecuritiesPubliclyTradedGrp/NonCashCheckboxInd | 0 | X |
| IRS990ScheduleM/SecuritiesPubliclyTradedGrp/NoncashContributionsRptF990Amt | 0 | 121594 |
| IRS990ScheduleM/ThirdPartiesUsedInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | OPERATION OF THE LIBRARY FOR THE BENEFIT OF NORTH HAVEN RESIDENTS AND VISITORS TO THE ISLAND. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | FORM 990 IS REVIEWED AND APPROVED BY THE ORGANIZATION'S TREASURER PRIOR TO FILING. THE TREASURER PROVIDES COPIES TO ALL BOARD MEMBERS AS REQUIRED. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | COPIES OF THE ORGANIZATION'S FORMS 990 ARE AVAILABLE TO THE PUBLIC UPON REQUEST. OTHER GOVERNING AND FINANCIAL DOCUMENTS ARE NOT AVAILABLE. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PAGE 2, PART III, LINE 4D |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PAGE 6, PART VI, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PAGE 6, PART VI, LINE 19 |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | false |
| IRS990/SubjectToProxyTaxInd | 0 | false |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
| IRS990/TotalAssetsBOYAmt | 0 | 1371865 |
| IRS990/TotalAssetsEOYAmt | 0 | 1586335 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 1371865 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 1586335 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 234925 |
| IRS990/TotalEmployeeCnt | 0 | 1 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 1260 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 7075 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 50564 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 58899 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 727 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 749 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 727 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 749 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 1371138 |
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