Liabilities / Assets
73rd percentile
Higher debt load relative to assets than 73% of similar nonprofits.
EIN 68-0280522 • 501(c)3 • Belvedere, CA
Profile
To support the Belvedere Tiburon Library through fundraising projects, private philanthropy, and advocacy.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
73rd percentile
Higher debt load relative to assets than 73% of similar nonprofits.
Liabilities / Revenue
81st percentile
Higher debt load relative to revenue than 81% of similar nonprofits.
Net Margin
81st percentile
Higher net margin than 81% of similar nonprofits.
Top Officer Pay
40th percentile
Higher top officer pay than 40% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
76th percentile
Faster asset growth than 76% of similar nonprofits.
Revenue Growth
93rd percentile
Faster revenue growth than 93% of similar nonprofits.
Assets
Up$1,215,558
Up $175,134 (+17%) from 2024
Liabilities
Down$354,709
Down $36,289 (-9.3%) from 2024
Net Assets
Up$860,849
Up $211,423 (+33%) from 2024
Revenue
Up$681,346
Up $382,271 (+128%) from 2024
Expenses
Down$469,923
Down $64,671 (-12%) from 2024
Net Income
Up$211,423
Up $446,942 (+190%) from 2024
Most recent year
2025 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
To support the Belvedere Tiburon Library through fundraising projects, private philanthropy, and advocacy.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $520,853 | $521,675 | ▲ $822 |
| Savings and Temporary Cash Investments | $243,637 | $424,044 | ▲ $180,407 |
| Cash and Non-Interest-Bearing Accounts | $162,218 | $214,732 | ▲ $52,514 |
| Pledges and Grants Receivable | $112,263 | $53,912 | ▼ $58,351 |
| Prepaid Expenses and Deferred Charges | $1,453 | $1,195 | ▼ $258 |
| Total Assets | $1,040,424 | $1,215,558 | ▲ $175,134 |
| Liabilities | |||
| Other Liabilities | $388,834 | $352,113 | ▼ $36,721 |
| Accounts Payable and Accrued Expenses | $2,164 | $2,596 | ▲ $432 |
| Total Liabilities | $390,998 | $354,709 | ▼ $36,289 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $388,229 | $436,292 | ▲ $48,063 |
| Net Assets With Donor Restrictions | $261,197 | $424,557 | ▲ $163,360 |
| Total Net Assets Fund Balance | $649,426 | $860,849 | ▲ $211,423 |
| Total Liabilities and Net Assets / Fund Balance | $1,040,424 | $1,215,558 | ▲ $175,134 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2024 | $178,184 | $382,487 | ▲ $12,706 | - | $423,377 |
| 2023 | $36,345 | $140,000 | ▲ $2,039 | - | $178,184 |
| 2022 | $106,421 | - | ▲ $124 | $70,200 | $36,345 |
| 2021 | $180,820 | $10,150 | ▲ $451 | $85,000 | $106,421 |
| 2020 | $180,820 | - | - | - | $180,820 |
| Name | Title |
|---|---|
| Lucy Churton | President |
| Mickey Hubbell | Vice President |
| Ann Aylwin | Director |
| Aviva Boedecker | Director |
| Brenda Bottum | Director |
| Crystal Duran | Director |
| Heather Lobdell | Director |
| Kelly Lauber | Director |
| Marty Winter | Director |
| Michelyn Good | Director |
| Sophia Ghaffary | Director |
| Sylvia Singh | Director |
| Tony Hooker | Director |
| Michelle Thomsen | Secretary |
| Toni Lee | Treasurer |
| Line Item | Amount |
|---|---|
| Other Expenses | $427,236 |
| Salaries, Compensation, and Employee Benefits | $42,687 |
| Total Fundraising Expense | $31,336 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $0 | $19,108 | $19,228 | $38,336 |
| Fees for Services Accounting | $0 | $13,394 | $0 | $13,394 |
| Other Expenses | $0 | $5,940 | $0 | $5,940 |
| Insurance | $0 | $4,545 | $0 | $4,545 |
| Payroll Taxes | $0 | $3,299 | $0 | $3,299 |
| Office Expenses | $0 | $1,190 | $0 | $1,190 |
| All Other Expenses | $96 | $1,015 | $0 | $1,111 |
| Other Employee Benefits | $0 | $1,052 | $0 | $1,052 |
| Fees for Services Other | $0 | $0 | $395 | $395 |
| Total Functional Expenses | $389,044 | $49,543 | $31,336 | $469,923 |
| Line Item | Amount |
|---|---|
| Fundraising Gross Income | $20,484 |
| Fundraising Direct Expenses | $12,479 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Teddy Bear Tea | $18,484 | $18,484 | $4,784 | $13,700 |
| Total Events | $18,484 | $18,484 | $4,784 | $13,700 |
| Liability | Amount |
|---|---|
| Charity Annuity Payable | $352,113 |
“The 990 is reviewed by the Finanace Committee and then brought to the Board of Directors for approval.”
“The Board of Directors appoints a performance and compensation review committee which researches salaries and benefits of comparable positions in the Bay Area to determine an appropriate level of compensation.”
“The Board of Directors appoints a performance and compensation review committee which researches salaries and benefits of comparable positions in the Bay Area to determine an appropriate level of compensation.”
“The foundation makes its governing documents and conflict of interest policy available for inspection at the library and given upon request.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 2164 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 2596 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | To support the Belvedere Tiburon Library through fundraising projects, private philanthropy, and advocacy. |
| IRS990/AllOtherContributionsAmt | 0 | 585534 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 1015 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 96 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 1111 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | false |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | Susan Bricarelli |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4152460745 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1501 Tiburon Blvd |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | Belvedere Tiburon |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94920 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 162218 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 214732 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | true |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 585534 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 25375 |
| IRS990/CYOtherExpensesAmt | 0 | 427236 |
| IRS990/CYOtherRevenueAmt | 0 | 8005 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 62432 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 211423 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 42687 |
| IRS990/CYTotalExpensesAmt | 0 | 469923 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 31336 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 681346 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/Desc | 0 | The Belvedere Tiburon Library Foundation coordinates Corner Books, a volunteer-run used book store which raises needed funds for the library. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 261197 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 424557 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | true |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 1 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 389044 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 13394 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 13394 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 395 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 395 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 15.00 |
| 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/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/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/PersonNm | 0 | Lucy Churton |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Mickey Hubbell |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Michelle Thomsen |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Toni Lee |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | Ann Aylwin |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Aviva Boedecker |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Brenda Bottum |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | Kelly Lauber |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | Heather Lobdell |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | Sylvia Singh |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | Marty Winter |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | Crystal Duran |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | Michelyn Good |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | Tony Hooker |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | Sophia Ghaffary |
| 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/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/TitleTxt | 0 | President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Vice President |
| 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/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1992 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingDirectExpensesAmt | 0 | 12479 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 20484 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 15 |
| IRS990/GrantAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 693825 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 15 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 0 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 4545 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 4545 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 25375 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 25375 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 520853 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 521675 |
| IRS990/IRPDocumentCnt | 0 | 2 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | To support the Belvedere Tiburon Library through fundraising projects, private philanthropy, and advocacy. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 649426 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 860849 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 8005 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 8005 |
| IRS990/NetIncmFromFundraisingEvtGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 388229 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 436292 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 1190 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 1190 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 1052 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 1052 |
| IRS990/OtherExpensesGrp/Desc | 0 | Event Costs |
| IRS990/OtherExpensesGrp/Desc | 1 | Fundraising |
| IRS990/OtherExpensesGrp/Desc | 2 | Library Grants |
| IRS990/OtherExpensesGrp/Desc | 3 | Bank Fees |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 11713 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 3 | 5940 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 4919 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 1329 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 382700 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 4919 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 13042 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 382700 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 5940 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 388834 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 352113 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 19228 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 19108 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 38336 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 3299 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 3299 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 112263 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 53912 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 1453 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 1195 |
| IRS990/PrincipalOfcrBusinessName/BusinessNameLine1Txt | 0 | Toni Lee |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 459210 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 459210 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | Corner Book Sales |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | Art Sales |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 1 | 0 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 33725 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 28707 |
| IRS990/ProgramServiceRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/UnrelatedBusinessRevenueAmt | 1 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 207444 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 6139 |
| IRS990/PYOtherExpensesAmt | 0 | 482096 |
| IRS990/PYOtherRevenueAmt | 0 | 14194 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 71298 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -235519 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 52498 |
| IRS990/PYTotalExpensesAmt | 0 | 534594 |
| IRS990/PYTotalRevenueAmt | 0 | 299075 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 211423 |
| IRS990/RegularMonitoringEnfrcInd | 0 | false |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | false |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 62432 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 243637 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 424044 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | Other Income Part II, Line 10 Description: Credit Card Rewards 2023: 100. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | Pt II Ln 10 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 585534 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 207444 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 439543 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1015195 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 1270287 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 3518003 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 25375 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 6139 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 20356 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | -29758 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 88510 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 110622 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 70437 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 100 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 100 |
| IRS990ScheduleA/OtherSupportSumAmt | 0 | 0 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.96950 |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.96800 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 3518003 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 0 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 585534 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 207444 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 439543 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1015195 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 1270287 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 3518003 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 3628725 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/TotalAmt | 0 | 0 |
| 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/CYEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 150000 |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 178184 |
| IRS990ScheduleD/CYEndwmtFundGrp/ContributionsAmt | 0 | 382487 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 423377 |
| IRS990ScheduleD/CYEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 12706 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 200 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 36345 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/ContributionsAmt | 0 | 140000 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 178184 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 2039 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 106421 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 36345 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 124 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 70200 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 180820 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/ContributionsAmt | 0 | 10150 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 106421 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 451 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 85000 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 180820 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 180820 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 352113 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | Charity Annuity Payable |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 352113 |
| IRS990ScheduleG/FundraisingEventInformationGrp/DirectExpenseSummaryEventsAmt | 0 | 4784 |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event1Nm | 0 | Teddy Bear Tea |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent1Amt | 0 | 18484 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsTotalAmt | 0 | 18484 |
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