Liabilities / Assets
65th percentile
Higher debt load relative to assets than 65% of similar nonprofits.
EIN 04-2280409 • 501(c)3 • Weston, MA
Profile
The museum provides a center of learning and activities that enable those of all ages to appreciate diverse cultures and peoples by exploring the ways they communicate through the world's postal systems.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
65th percentile
Higher debt load relative to assets than 65% of similar nonprofits.
Liabilities / Revenue
83rd percentile
Higher debt load relative to revenue than 83% of similar nonprofits.
Net Margin
8th percentile
Higher net margin than 8% of similar nonprofits.
Top Officer Pay
55th percentile
Higher top officer pay than 55% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
24th percentile
Faster asset growth than 24% of similar nonprofits.
Revenue Growth
10th percentile
Faster revenue growth than 10% of similar nonprofits.
Assets
Down$690,745
Down $53,673 (-7.2%) from 2023
Liabilities
Down$52,949
Down $3,608 (-6.4%) from 2023
Net Assets
Down$637,796
Down $50,065 (-7.3%) from 2023
Revenue
Down$160,920
Down $91,599 (-36%) from 2023
Expenses
Up$236,880
Up $30,009 (+15%) from 2023
Net Income
Down-$75,960
Down $121,608 (-266%) from 2023
Most recent year
2024 • Form 990XML pending. An XML filing is linked for this year, but detailed extraction is still pending.
The latest 2024 filing currently has linked XML that has not been fully parsed yet. Showing the latest detailed filing from 2023 below.
The museum provides a center of learning and activities that enable those of all ages to appreciate diverse cultures and peoples by exploring the ways they communicate through the world's postal systems.
The spellman museum is a center of learning and activities for people of all ages. It will preserve, enhance and expand its collections, library and facilities as a philatelic trust for the education and entertainment of the general public; to promote the hobby of stamp collecting and to be a resource for historians.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $227,006 | $298,316 | ▲ $71,310 |
| Land, Buildings, and Equipment, Net | $236,085 | $230,729 | ▼ $5,356 |
| Cash and Non-Interest-Bearing Accounts | $196,721 | $160,458 | ▼ $36,263 |
| Savings and Temporary Cash Investments | $22,373 | $35,688 | ▲ $13,315 |
| Accounts Receivable | - | $8,150 | - |
| Pledges and Grants Receivable | - | $7,918 | - |
| Prepaid Expenses and Deferred Charges | $3,159 | $3,159 | → $0 |
| Total Assets | $685,344 | $744,418 | ▲ $59,074 |
| Liabilities | |||
| Unsecured Notes Loans Payable | $49,500 | $43,500 | ▼ $6,000 |
| Accounts Payable and Accrued Expenses | $12,600 | $13,057 | ▲ $457 |
| Total Liabilities | $62,100 | $56,557 | ▼ $5,543 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $623,244 | $687,861 | ▲ $64,617 |
| Total Net Assets Fund Balance | $623,244 | $687,861 | ▲ $64,617 |
| Total Liabilities and Net Assets / Fund Balance | $685,344 | $744,418 | ▲ $59,074 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Leasehold Improvements | $229,929 | $30,036 | $259,965 |
| Equipment | $800 | $151,401 | $152,201 |
| Name | Title |
|---|---|
| Yamil H Kouri Md | Chair |
| David Dubois | Trustee |
| Dr Mary-anne Vetterling | Trustee |
| Helen Sullivan Csj | Trustee |
| Jeffrey Shapiro | Trustee |
| John Hennessey | Trustee |
| Kathleen Berube Csj | Trustee |
| Kathryn Edney Phd | Trustee |
| Maureen R Berube | Trustee |
| Norm Shufrin | Trustee |
| Robert Savage | Trustee |
| Rosemary Brennan Csj | Trustee |
| Antoinette Hays Rn Phd | Ex Officio Member |
| S Lee Hogan Csj | Ex Officio Member |
| Margaret Wallace Csj | Recording Secretary |
| Michael Lawson | Treasurer |
| Contribution Type | Contribution Count | Reported Amount | Valuation Method |
|---|---|---|---|
| Real Estate Commercial | 1 | $154,131 | In Kind Rent and Mainten |
| Total Noncash Contributions | 1 | $154,131 | - |
| Line Item | Amount |
|---|---|
| Other Expenses | $176,629 |
| Total Fundraising Expense | $39,207 |
| Salaries, Compensation, and Employee Benefits | $30,242 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Fees for Services Management | $15,690 | $15,690 | $31,380 | $62,760 |
| Occupancy | $42,562 | $5,260 | - | $47,822 |
| Other Salaries and Wages | $9,890 | $14,128 | $4,239 | $28,257 |
| Fees for Services Accounting | - | $23,315 | - | $23,315 |
| Insurance | $4,830 | $1,744 | $135 | $6,709 |
| Depreciation Depletion | $5,479 | $677 | - | $6,156 |
| Office Expenses | $1,463 | $3,321 | - | $4,784 |
| Fees for Service Investment Mgmnt Fees | - | $3,425 | - | $3,425 |
| Other Expenses | $2,549 | $2,137 | $2,957 | $2,549 |
| Payroll Taxes | $794 | $695 | $496 | $1,985 |
| Advertising | $1,185 | - | - | $1,185 |
| All Other Expenses | $800 | - | - | $800 |
| Total Functional Expenses | $88,575 | $79,089 | $39,207 | $206,871 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“The form 990 was reviewed by the chairman and other board members prior to its filing.”
“The president and treasurer monitor compliance annually and report to the board of directors.”
“The museum maintains its form 990 at the museum where it is available for public inspection upon request. The form 990 is also available at the guidestar website and the commonweath of massachusetts attorney general's website.”
“The museum's stamp collection, which was acquired entirely by contributions since the museum's inception, is not recognized as an asset on the museum's books, as the trustees have exercise their option not to capitalize the collection.”
“The museum's collection is on the of the largest, privately created philatelic collections in the world and one of two public museums in the united states devoted to stamps and postal history. The museum is open to the public and the museum's mission is to promote knowledge and understanding of worldwide history and geography through the study of stamps, letters, and other artifacts of people's communication through mail. This educational mission is advanced through exhibitions, a resource center and library, and programs for children, families and adults.”
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 | 12600 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 13057 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 8150 |
| IRS990/AcctCompileOrReviewBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | THE SPELLMAN MUSEUM IS A CENTER OF LEARNING AND ACTIVITIES FOR PEOPLE OF ALL AGES. IT WILL PRESERVE, ENHANCE AND EXPAND ITS COLLECTIONS, LIBRARY AND FACILITIES AS A PHILATELIC TRUST FOR THE EDUCATION AND ENTERTAINMENT OF THE GENERAL PUBLIC; TO PROMOTE THE HOBBY OF STAMP COLLECTING AND TO BE A RESOURCE FOR HISTORIANS. |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 1185 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 1185 |
| IRS990/AllOtherContributionsAmt | 0 | 114837 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 800 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 800 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 0 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | THE ORGANIZATION |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 7817688367 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 241 WELLESLEY STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | WESTON |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02493 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 196721 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 160458 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| 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/CostOfGoodsSoldAmt | 0 | 689 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 132789 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 19081 |
| IRS990/CYOtherExpensesAmt | 0 | 176629 |
| IRS990/CYOtherRevenueAmt | 0 | 90715 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 9934 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 45648 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 30242 |
| IRS990/CYTotalExpensesAmt | 0 | 206871 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 39207 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 252519 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 677 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 5479 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 6156 |
| IRS990/Desc | 0 | THE MUSEUM CONDUCTS PUBLIC PROGRAMS, PRESENTS EXHIBITIONS AND PROVIDES RESEARCH SERVICES TO ENABLE ALL PEOPLE TO APPRECIATE DIVERSE CULTURES AND PEOPLE BY COMMUNICATION THROUG HTHE WORLD'S POSTAL SYSTEM. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 5 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 88575 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 23315 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 23315 |
| IRS990/FeesForServicesManagementGrp/FundraisingAmt | 0 | 31380 |
| IRS990/FeesForServicesManagementGrp/ManagementAndGeneralAmt | 0 | 15690 |
| IRS990/FeesForServicesManagementGrp/ProgramServicesAmt | 0 | 15690 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 62760 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 3425 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 3425 |
| 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 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| 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 | 1.00 |
| 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 | YAMIL H KOURI MD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | MICHAEL LAWSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | S LEE HOGAN CSJ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | ROSEMARY BRENNAN CSJ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | ANTOINETTE HAYS RN PHD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JOHN HENNESSEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MAUREEN R BERUBE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | ROBERT SAVAGE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | MARGARET WALLACE CSJ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | HELEN SULLIVAN CSJ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | KATHLEEN BERUBE CSJ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | KATHRYN EDNEY PHD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | DAVID DUBOIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | JEFFREY SHAPIRO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | DR MARY-ANNE VETTERLING |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | NORM SHUFRIN |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
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| 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 |
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| 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 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | EX OFFICIO MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | EX OFFICIO MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | RECORDING SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | TRUSTEE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/FormationYr | 0 | 1960 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 12863 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 16 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 138585 |
| IRS990/GrossReceiptsAmt | 0 | 378930 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 1380 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 90024 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 16 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 135 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 1744 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 4830 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 6709 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 6218 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 6218 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 227006 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 298316 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 181437 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 236085 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 230729 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 412166 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 125722 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 17952 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | THE MUSEUM PROVIDES A CENTER OF LEARNING AND ACTIVITIES THAT ENABLE THOSE OF ALL AGES TO APPRECIATE DIVERSE CULTURES AND PEOPLES BY EXPLORING THE WAYS THEY COMMUNICATE THROUGH THE WORLD'S POSTAL SYSTEMS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 623244 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 687861 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 12863 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 12863 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 89335 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 89335 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 1380 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 1380 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 18969 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 623244 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 687861 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 5260 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 42562 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 47822 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 3321 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 1463 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 4784 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | ADMIN EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 1 | PRINTING |
| IRS990/OtherExpensesGrp/Desc | 2 | DEVELOPEMENT EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 3 | PROGRAM SERVICES |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 2957 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 8697 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 2137 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 3333 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 2549 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 8697 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 5470 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 2957 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 2549 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 4239 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 14128 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 9890 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 28257 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 496 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 695 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 794 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 1985 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 7918 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 3159 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 3159 |
| IRS990/PrincipalOfficerNm | 0 | MICHAEL LAWSON |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | EDUCATION PROGRAMS |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | MUSEUM ADMISSION |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | POSTAL CONTRACT |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 3475 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 3430 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 3029 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 3475 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 3430 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 3029 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 134014 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 44559 |
| IRS990/PYOtherExpensesAmt | 0 | 162608 |
| IRS990/PYOtherRevenueAmt | 0 | 111829 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 11558 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 132970 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 6382 |
| IRS990/PYTotalExpensesAmt | 0 | 168990 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 301960 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 45648 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 1380 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 99269 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 22373 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 35688 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 132789 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 134014 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 140754 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 61558 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 41795 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 510910 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 19084 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 5546 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 17674 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 7821 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 7421 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 57546 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 423834 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.89880 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.89690 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 510910 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 132789 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 134014 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 140754 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 61558 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 41795 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 510910 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 568456 |
| 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/EquipmentGrp/BookValueAmt | 0 | 800 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 151401 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 152201 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 229929 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 30036 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 259965 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE MUSEUM'S STAMP COLLECTION, WHICH WAS ACQUIRED ENTIRELY BY CONTRIBUTIONS SINCE THE MUSEUM'S INCEPTION, IS NOT RECOGNIZED AS AN ASSET ON THE MUSEUM'S BOOKS, AS THE TRUSTEES HAVE EXERCISE THEIR OPTION NOT TO CAPITALIZE THE COLLECTION. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | THE MUSEUM'S COLLECTION IS ON THE OF THE LARGEST, PRIVATELY CREATED PHILATELIC COLLECTIONS IN THE WORLD AND ONE OF TWO PUBLIC MUSEUMS IN THE UNITED STATES DEVOTED TO STAMPS AND POSTAL HISTORY. THE MUSEUM IS OPEN TO THE PUBLIC AND THE MUSEUM'S MISSION IS TO PROMOTE KNOWLEDGE AND UNDERSTANDING OF WORLDWIDE HISTORY AND GEOGRAPHY THROUGH THE STUDY OF STAMPS, LETTERS, AND OTHER ARTIFACTS OF PEOPLE'S COMMUNICATION THROUGH MAIL. THIS EDUCATIONAL MISSION IS ADVANCED THROUGH EXHIBITIONS, A RESOURCE CENTER AND LIBRARY, AND PROGRAMS FOR CHILDREN, FAMILIES AND ADULTS. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART III, LINE A |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART III, LINE 4 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 230729 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990ScheduleM/AnyPropertyThatMustBeHeldInd | 0 | 0 |
| IRS990ScheduleM/RealEstateCommercialGrp/ContributionCnt | 0 | 1 |
| IRS990ScheduleM/RealEstateCommercialGrp/MethodOfDeterminingRevenuesTxt | 0 | IN KIND RENT AND MAINTEN |
| IRS990ScheduleM/RealEstateCommercialGrp/NonCashCheckboxInd | 0 | X |
| IRS990ScheduleM/RealEstateCommercialGrp/NoncashContributionsRptF990Amt | 0 | 154131 |
| IRS990ScheduleM/ReviewProcessUnusualNCGiftsInd | 0 | 0 |
| IRS990ScheduleM/ThirdPartiesUsedInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE FORM 990 WAS REVIEWED BY THE CHAIRMAN AND OTHER BOARD MEMBERS PRIOR TO ITS FILING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | THE PRESIDENT AND TREASURER MONITOR COMPLIANCE ANNUALLY AND REPORT TO THE BOARD OF DIRECTORS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | THE MUSEUM MAINTAINS ITS FORM 990 AT THE MUSEUM WHERE IT IS AVAILABLE FOR PUBLIC INSPECTION UPON REQUEST. THE FORM 990 IS ALSO AVAILABLE AT THE GUIDESTAR WEBSITE AND THE COMMONWEATH OF MASSACHUSETTS ATTORNEY GENERAL'S WEBSITE. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 12C |
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