Liabilities / Assets
31st percentile
Higher debt load relative to assets than 31% of similar nonprofits.
EIN 47-5391781 • 501(c)3 • Cambridge, MA
Profile
To support the cambridge public library.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
31st percentile
Higher debt load relative to assets than 31% of similar nonprofits.
Liabilities / Revenue
40th percentile
Higher debt load relative to revenue than 40% of similar nonprofits.
Net Margin
91st percentile
Higher net margin than 91% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
80th percentile
Faster asset growth than 80% of similar nonprofits.
Revenue Growth
51st percentile
Faster revenue growth than 51% of similar nonprofits.
Assets
Up$3,532,640
Up $490,664 (+16%) from 2024
Liabilities
Up$31,807
Up $7,556 (+31%) from 2024
Net Assets
Up$3,500,833
Up $483,108 (+16%) from 2024
Revenue
Down$824,423
Down $143,582 (-15%) from 2024
Expenses
Up$371,812
Up $64,913 (+21%) from 2024
Net Income
Down$452,611
Down $208,495 (-32%) from 2024
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
To support the cambridge public library.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $2,634,320 | $3,055,353 | ▲ $421,033 |
| Cash and Non-Interest-Bearing Accounts | $230,099 | $389,286 | ▲ $159,187 |
| Pledges and Grants Receivable | $170,000 | $80,000 | ▼ $90,000 |
| Prepaid Expenses and Deferred Charges | $7,557 | $8,001 | ▲ $444 |
| Total Assets | $3,041,976 | $3,532,640 | ▲ $490,664 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $24,251 | $31,807 | ▲ $7,556 |
| Total Liabilities | $24,251 | $31,807 | ▲ $7,556 |
| Net Assets / Fund Balance | |||
| Net Assets With Donor Restrictions | $1,654,130 | $1,887,958 | ▲ $233,828 |
| Net Assets Without Donor Restrictions | $1,363,595 | $1,612,875 | ▲ $249,280 |
| Total Net Assets Fund Balance | $3,017,725 | $3,500,833 | ▲ $483,108 |
| Total Liabilities and Net Assets / Fund Balance | $3,041,976 | $3,532,640 | ▲ $490,664 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2024 | $842,977 | $258,959 | - | - | $1,101,936 |
| 2023 | $743,908 | $99,069 | - | - | $842,977 |
| 2022 | $565,650 | $178,258 | - | - | $743,908 |
| 2021 | $467,343 | $98,307 | - | - | $565,650 |
| 2020 | $434,495 | $32,848 | - | - | $467,343 |
| Name | Title |
|---|---|
| Kate Flaim | President |
| Cathy Chute | Director |
| Ed Belove | Director |
| Isaiah Jackson | Director |
| Jill Burrows | Director |
| Katie Lapp | Director |
| Kay Calvert | Director |
| Lauren Holleran | Director |
| Mahmood Firouzbakht | Director |
| Sheila Thimba | Director |
| Shippen L Page | Director |
| Stan Twarog | Director |
| Susan Flannery | Director |
| Tamara Rogers | Director |
| David Sandberg | Secretary |
| Shahid Azim | Treasurer |
| Line Item | Amount |
|---|---|
| Other Expenses | $225,670 |
| Salaries, Compensation, and Employee Benefits | $146,142 |
| Total Fundraising Expense | $89,804 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Current Officers, Directors, Trustees, and Key Employees | $20,768 | $32,619 | $35,774 | $89,161 |
| Other Salaries and Wages | $10,687 | $16,786 | $18,410 | $45,883 |
| Fees for Services Accounting | - | $31,566 | - | $31,566 |
| Fees for Services Other | - | $11,197 | $12,125 | $23,322 |
| All Other Expenses | - | $3,105 | $8,578 | $11,683 |
| Payroll Taxes | $2,700 | $4,212 | $3,888 | $10,800 |
| Other Expenses | $22,615 | $4,497 | $5,111 | $9,608 |
| Office Expenses | - | $1,897 | $5,172 | $7,069 |
| Insurance | - | $3,591 | - | $3,591 |
| Advertising | - | $178 | $686 | $864 |
| Other Employee Benefits | $89 | $149 | $60 | $298 |
| Total Functional Expenses | $172,211 | $109,797 | $89,804 | $371,812 |
| Line Item | Amount |
|---|---|
| Expenses per Audited Statements | $371,812 |
| Total Expenses per Audited Statements | $371,812 |
| Total Expenses per Form 990 | $371,812 |
| Expenses Not Reported on Financial Statements | $0 |
| Expenses Not Reported on Form 990 | $0 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“Annual form 990 is reviewed by board of members prior to filing”
“Board receives and signs an annual conflict of interest statement.”
“Documents can be obtained from the president, at the organizations address on this return.”
“Yes, the finance committee oversees the cpa selection process, review process and approves reviewed financial statements.”
“The organization has adopted investment and spending policies for endowment assets that attempt to provide a predictable stream of funding to programs supported by its endowment while seeking to maintain the purchasing power of the endowment assets.”
“The organization adopted the standards for accounting for uncertainty in income taxes (income, sales, use and payroll), which required the organization to report any uncertain tax positions and to adjust its financial statements for the impact thereof. During the fiscal year, the organization determined that it had no tax positions that did not meet the "more likely than not" threshold of being sustained by the applicable tax authority. The organization files tax and information returns in the united states federal and applicable state jurisdictions. These returns are generally subject to examination by tax authorities for the last three years.”
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 | 1 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 24251 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 31807 |
| IRS990/AcctCompileOrReviewBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | TO SUPPORT THE CAMBRIDGE PUBLIC LIBRARY. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 686 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 178 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 864 |
| IRS990/AllOtherContributionsAmt | 0 | 626909 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 8578 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 3105 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 11683 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | MARTA LEE-PERRIARD |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6177980959 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 449 BROADWAY |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | CAMBRIDGE |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02138 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 230099 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 389286 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 35774 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 32619 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 20768 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 89161 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 626909 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 67599 |
| IRS990/CYOtherExpensesAmt | 0 | 225670 |
| IRS990/CYOtherRevenueAmt | 0 | 129915 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 452611 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 146142 |
| IRS990/CYTotalExpensesAmt | 0 | 371812 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 89804 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 824423 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | THE CAMBRIDGE PUBLIC LIBRARY SETS GOALS EACH YEAR FOR INITIATIVES, PROGRAMS, AND SERVICES. SOME OF THE KEY GOALS WERE TO OFFER AN EXCELLENT SLATE OF PROGRAMMING AND SERVICES AND TO STEWARD ONGOING RELATIONSHIPS WITH VITAL COMMUNITY PARTNERS. THIS YEAR, THE FOUNDATION SUPPORTED THE LIBRARY DURING A SUCCESSFUL YEAR OF DELIVERING A HOST OF PROGRAMS AND SERVICES RELATED TO ITS MISSION TO WELCOME ALL, INSPIRE MINDS, AND EMPOWER COMMUNITY. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1654130 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1887958 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 1 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 3 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 172211 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 31566 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 31566 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 12125 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 11197 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 23322 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 1.00 |
| 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/IndividualTrusteeOrDirectorInd | 15 | 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 |
| 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/OtherCompensationAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | SHIPPEN L PAGE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | DAVID SANDBERG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | KATIE LAPP |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | SHAHID AZIM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | ED BELOVE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JILL BURROWS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | KAY CALVERT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | CATHY CHUTE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | MAHMOOD FIROUZBAKHT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | KATE FLAIM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | SUSAN FLANNERY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | ISAIAH JACKSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | LAUREN HOLLERAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | TAMARA ROGERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | SHEILA THIMBA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | STAN TWAROG |
| 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/ReportableCompFromOrgAmt | 15 | 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/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | DIRECTOR |
| 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 | PRESIDENT |
| 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/Form990PartVIISectionAGrp/TitleTxt | 15 | DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2015 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 14 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 824423 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 14 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 3591 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 3591 |
| IRS990/InvestmentIncomeGrp/RelatedOrExemptFuncIncomeAmt | 0 | 67599 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 67599 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 2634320 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 3055353 |
| IRS990/IRPDocumentCnt | 0 | 29 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | TO SUPPORT THE CAMBRIDGE PUBLIC LIBRARY. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 3017725 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 3500833 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 30497 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1363595 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1612875 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 5172 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 1897 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 7069 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 60 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 149 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 89 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 298 |
| IRS990/OtherExpensesGrp/Desc | 0 | PROGRAMMING EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 1 | EVENT EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 2 | LIBRARY BOOKS, SUPPLIES |
| IRS990/OtherExpensesGrp/Desc | 3 | SOFTWARE SUBSCRIPTIONS |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 5111 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 4497 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 82679 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 32673 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 22615 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 82679 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 32673 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 22615 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 9608 |
| IRS990/OtherInd | 0 | X |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 611710 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | REALIZED GAINS |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 129915 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 129915 |
| IRS990/OtherRevenueTotalAmt | 0 | 129915 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 18410 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 16786 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 10687 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 45883 |
| IRS990/OwnWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 3888 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 4212 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 2700 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 10800 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 170000 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 80000 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 7557 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 8001 |
| IRS990/PrincipalOfficerNm | 0 | KATE FLAIM |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 740317 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 52311 |
| IRS990/PYOtherExpensesAmt | 0 | 187447 |
| IRS990/PYOtherRevenueAmt | 0 | 175377 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 661106 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 119452 |
| IRS990/PYTotalExpensesAmt | 0 | 306899 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 968005 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 452611 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 0 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 626909 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 740317 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 590732 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 578107 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 565829 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 3101894 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 67599 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 52311 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 39435 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 31981 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 22207 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 213533 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 101268 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 43 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 315 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 101626 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.90780 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.91880 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 3101894 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 626909 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 740317 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 590732 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 578107 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 565829 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 3101894 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 3417053 |
| 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 |
| IRS990ScheduleD/BoardDesignatedBalanceEOYPct | 0 | 0.10700 |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 842977 |
| IRS990ScheduleD/CYEndwmtFundGrp/ContributionsAmt | 0 | 258959 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 1101936 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 743908 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/ContributionsAmt | 0 | 99069 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 842977 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 565650 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/ContributionsAmt | 0 | 178258 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 743908 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 467343 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/ContributionsAmt | 0 | 98307 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 565650 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 434495 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/ContributionsAmt | 0 | 32848 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 467343 |
| IRS990ScheduleD/EndowmentsHeldRelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/EndowmentsHeldUnrelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 371812 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/NetUnrealizedGainsInvstAmt | 0 | 30497 |
| IRS990ScheduleD/PrmnntEndowmentBalanceEOYPct | 0 | 0.89300 |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 30497 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 824423 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE ORGANIZATION HAS ADOPTED INVESTMENT AND SPENDING POLICIES FOR ENDOWMENT ASSETS THAT ATTEMPT TO PROVIDE A PREDICTABLE STREAM OF FUNDING TO PROGRAMS SUPPORTED BY ITS ENDOWMENT WHILE SEEKING TO MAINTAIN THE PURCHASING POWER OF THE ENDOWMENT ASSETS. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | THE ORGANIZATION ADOPTED THE STANDARDS FOR ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES (INCOME, SALES, USE AND PAYROLL), WHICH REQUIRED THE ORGANIZATION TO REPORT ANY UNCERTAIN TAX POSITIONS AND TO ADJUST ITS FINANCIAL STATEMENTS FOR THE IMPACT THEREOF. DURING THE FISCAL YEAR, THE ORGANIZATION DETERMINED THAT IT HAD NO TAX POSITIONS THAT DID NOT MEET THE "MORE LIKELY THAN NOT" THRESHOLD OF BEING SUSTAINED BY THE APPLICABLE TAX AUTHORITY. THE ORGANIZATION FILES TAX AND INFORMATION RETURNS IN THE UNITED STATES FEDERAL AND APPLICABLE STATE JURISDICTIONS. THESE RETURNS ARE GENERALLY SUBJECT TO EXAMINATION BY TAX AUTHORITIES FOR THE LAST THREE YEARS. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART V, LINE 4: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART X, LINE 2: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 0 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 371812 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 824423 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 854920 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 371812 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | ANNUAL FORM 990 IS REVIEWED BY BOARD OF MEMBERS PRIOR TO FILING |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | BOARD RECEIVES AND SIGNS AN ANNUAL CONFLICT OF INTEREST STATEMENT. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | DOCUMENTS CAN BE OBTAINED FROM THE PRESIDENT, AT THE ORGANIZATIONS ADDRESS ON THIS RETURN. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | YES, THE FINANCE COMMITTEE OVERSEES THE CPA SELECTION PROCESS, REVIEW PROCESS AND APPROVES REVIEWED FINANCIAL STATEMENTS. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 12C |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART XII, LINE 2C: |
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