Liabilities / Assets
81st percentile
Higher debt load relative to assets than 81% of similar nonprofits.
EIN 04-3491719 • 501(c)3 • Nantucket, MA
Profile
Nantucket lighthouse school education calls forth inherent social, intellectual, and moral wisdom and prepares each child to lead a responsible and joyful life.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
81st percentile
Higher debt load relative to assets than 81% of similar nonprofits.
Liabilities / Revenue
84th percentile
Higher debt load relative to revenue than 84% of similar nonprofits.
Net Margin
27th percentile
Higher net margin than 27% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
43rd percentile
Faster asset growth than 43% of similar nonprofits.
Revenue Growth
54th percentile
Faster revenue growth than 54% of similar nonprofits.
Assets
Up$3,813,470
Up $61,409 (+1.6%) from 2023
Liabilities
Up$1,672,847
Up $218,652 (+15%) from 2023
Net Assets
Down$2,140,623
Down $157,243 (-6.8%) from 2023
Revenue
Up$2,496,317
Up $213,471 (+9.4%) from 2023
Expenses
Down$2,653,560
Down $28,623 (-1.1%) from 2023
Net Income
Up-$157,243
Up $242,094 (+61%) from 2023
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
Nantucket lighthouse school education calls forth inherent social, intellectual, and moral wisdom and prepares each child to lead a responsible and joyful life.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $3,172,885 | $3,167,099 | ▼ $5,786 |
| Cash and Non-Interest-Bearing Accounts | $541,843 | $590,573 | ▲ $48,730 |
| Prepaid Expenses and Deferred Charges | $36,301 | $54,426 | ▲ $18,125 |
| Accounts Receivable | $1,032 | $1,372 | ▲ $340 |
| Total Assets | $3,752,061 | $3,813,470 | ▲ $61,409 |
| Liabilities | |||
| Deferred Revenue | $657,473 | $853,708 | ▲ $196,235 |
| Mortgage Notes Payable Secured by Investment Property | $677,295 | $656,368 | ▼ $20,927 |
| Accounts Payable and Accrued Expenses | $119,427 | $162,771 | ▲ $43,344 |
| Total Liabilities | $1,454,195 | $1,672,847 | ▲ $218,652 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $2,018,866 | $1,713,623 | ▼ $305,243 |
| Net Assets With Donor Restrictions | $279,000 | $427,000 | ▲ $148,000 |
| Total Net Assets Fund Balance | $2,297,866 | $2,140,623 | ▼ $157,243 |
| Total Liabilities and Net Assets / Fund Balance | $3,752,061 | $3,813,470 | ▲ $61,409 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $1,947,574 | $1,499,033 | $3,446,607 |
| Land | $1,146,000 | - | $1,146,000 |
| Equipment | $73,525 | $128,843 | $202,368 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2023 | $271,000 | $150,000 | - | - | $421,000 |
| 2022 | $146,721 | $124,279 | - | - | $271,000 |
| 2021 | $109,500 | $37,221 | - | - | $146,721 |
| 2020 | - | $109,500 | - | - | $109,500 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Emily Miller | Head of School | FT | $130,000 | $12,555 | $142,555 |
| Travers Grant | Camp Representative | FT | $105,000 | $2,652 | $107,652 |
| Adaruth Waig | Business Manager | FT | $87,250 | $5,135 | $92,385 |
| Name | Title |
|---|---|
| Charity Grace Mofsen | Co-chair |
| Scott Nelson | Co-chair |
| AMANDA O'BRIEN | Trustee |
| Erin Henry | Trustee |
| Jim Schultz | Trustee |
| Joseph Freeman | Trustee |
| Kelly Flynn Bartlett | Trustee |
| Kim Huffman-cary | Trustee |
| Laura Cunningham | Trustee |
| Margaret Feindel | Trustee |
| Pat Mcevoy | Trustee |
| Quinn Veysey | Trustee |
| Lizbet Carroll Fuller | Emerita |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $1,622,474 |
| Other Expenses | $734,171 |
| Grants and Similar Amounts Paid | $296,915 |
| Total Fundraising Expense | $105,848 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $931,763 | $389,970 | $68,818 | $1,390,551 |
| Grants to Domestic Individuals | $296,915 | - | - | $296,915 |
| Occupancy | $221,267 | $11,645 | - | $232,912 |
| Depreciation Depletion | $139,052 | $7,319 | - | $146,371 |
| Payroll Taxes | $80,987 | $37,150 | $6,556 | $124,693 |
| Other Employee Benefits | $47,522 | $50,752 | $8,956 | $107,230 |
| Fees for Services Legal | - | $42,114 | - | $42,114 |
| Insurance | $27,780 | $5,083 | - | $32,863 |
| Interest | $25,838 | $1,660 | - | $27,498 |
| Advertising | - | $10,097 | $17,152 | $27,249 |
| Fees for Services Accounting | - | $23,857 | - | $23,857 |
| Fees for Services Other | - | $20,380 | - | $20,380 |
| Travel | $13,692 | $1,021 | - | $14,713 |
| All Other Expenses | $4,762 | $6,631 | $87 | $11,480 |
| Other Expenses | $6,578 | $580 | $974 | $8,132 |
| Office Expenses | $708 | $384 | $2,325 | $3,417 |
| Total Functional Expenses | $1,897,683 | $650,029 | $105,848 | $2,653,560 |
| Line Item | Amount |
|---|---|
| Total Expenses per Form 990 | $2,653,560 |
| Expenses per Audited Statements | $2,356,645 |
| Total Expenses per Audited Statements | $2,356,645 |
| Expenses Not Reported on Financial Statements | $296,915 |
| Other Expense Adjustments | $296,915 |
| Expenses Not Reported on Form 990 | $0 |
| Line Item | Amount |
|---|---|
| Fundraising Gross Income | $124,752 |
| Fundraising Direct Expenses | $65,035 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Yuletide | $75,372 | $53,480 | $25,572 | $27,908 |
| Garden Festival | $52,480 | $32,380 | $17,310 | $15,070 |
| Total Events | $170,794 | $124,752 | $65,035 | $59,717 |
“The form 990 is distributed electronicaly to the board prior to filing. Comments and questions are forwarded to the business manager who resolves them with the return preparer.”
“Annually the trustees provide the board with information regarding any conflicts.”
“Trustees review independent surveys and comparability data to determine compensation for ceo, executive director and top management officials.”
“Requests for access are forwarded to the business manager who makes arrangements for review of the information.”
“To provide scholarships for students”
“Student financial aid 296,915.”
“Student financial aid 296,915.”
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 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 119427 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 162771 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 1032 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 1372 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | NANTUCKET LIGHTHOUSE SCHOOL EDUCATION CALLS FORTH INHERENT SOCIAL, INTELLECTUAL, AND MORAL WISDOM AND PREPARES EACH CHILD TO LEAD A RESPONSIBLE AND JOYFUL LIFE. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 17152 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 10097 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 27249 |
| IRS990/AllOtherContributionsAmt | 0 | 492577 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 87 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 6631 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 4762 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 11480 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | ADARUTH WAIG |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5082280427 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1 RUGGED ROAD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | NANTUCKET |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02554 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 541843 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 590573 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContriRptFundraisingEventAmt | 0 | 46042 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 538619 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 296915 |
| IRS990/CYInvestmentIncomeAmt | 0 | 12334 |
| IRS990/CYOtherExpensesAmt | 0 | 734171 |
| IRS990/CYOtherRevenueAmt | 0 | 64900 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 1880464 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -157243 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 1622474 |
| IRS990/CYTotalExpensesAmt | 0 | 2653560 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 105848 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 2496317 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 657473 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 853708 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 7319 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 139052 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 146371 |
| IRS990/Desc | 0 | OPERATION OF A SCHOOL DEDICATED TO CHILDREN DURING THEIR PRE-SCHOOL AND ELEMENTARY YEARS. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 279000 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 427000 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 1 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 52 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 1897683 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 23857 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 23857 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 42114 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 42114 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 20380 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 20380 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| 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/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 | 12555 |
| 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 | 5135 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 2652 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | CHARITY GRACE MOFSEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | EMILY MILLER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | SCOTT NELSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | LAURA CUNNINGHAM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | LIZBET CARROLL FULLER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JOSEPH FREEMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | KIM HUFFMAN-CARY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | MARGARET FEINDEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ERIN HENRY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | PAT MCEVOY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | AMANDA O'BRIEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | QUINN VEYSEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | JIM SCHULTZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | KELLY FLYNN BARTLETT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | ADARUTH WAIG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | TRAVERS GRANT |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 130000 |
| 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 | 87250 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 105000 |
| 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 | CO-CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | CO-CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | EMERITA |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | BUSINESS MANAGER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | CAMP REPRESENTATIVE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2000 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 1 |
| IRS990/FundraisingAmt | 0 | 46042 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 65035 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 124752 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 14 |
| IRS990/GrantAmt | 0 | 296915 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 296915 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 296915 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 2561352 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 900 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 13 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 5083 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 27780 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 32863 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 1660 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 25838 |
| IRS990/InterestGrp/TotalAmt | 0 | 27498 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 12334 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 12334 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 17 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 1627876 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 3172885 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 3167099 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 4794975 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| 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 | NANTUCKET LIGHTHOUSE SCHOOL EDUCATION CALLS FORTH INHERENT SOCIAL, INTELLECTUAL, AND MORAL WISDOM AND PREPARES EACH CHILD TO LEAD A RESPONSIBLE AND JOYFUL LIFE. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 677295 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 656368 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 2297866 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 2140623 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 59717 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 59717 |
| IRS990/NetRentalIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 900 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 900 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 2018866 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1713623 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 11645 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 221267 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 232912 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 2325 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 384 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 708 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 3417 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 8956 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 50752 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 47522 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 107230 |
| IRS990/OtherExpensesGrp/Desc | 0 | EQUIPMENT & SUPPLIES |
| IRS990/OtherExpensesGrp/Desc | 1 | BANK & CREDIT CARD FEES |
| IRS990/OtherExpensesGrp/Desc | 2 | DUES & SUBSCRIPTIONS |
| IRS990/OtherExpensesGrp/Desc | 3 | PROFESSIONAL DEVELOPMEN |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 980 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 974 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 9201 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 32185 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 580 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 85562 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 40 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 15217 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 6578 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 95743 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 32225 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 15217 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 8132 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 611110 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | MISCELLANEOUS INCOME |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 4283 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 4283 |
| IRS990/OtherRevenueTotalAmt | 0 | 4283 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 68818 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 389970 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 931763 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 1390551 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 6556 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 37150 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 80987 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 124693 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 36301 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 54426 |
| IRS990/PrincipalOfficerNm | 0 | EMILY MILLER |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611600 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | TUITION AND PROGRAM FE |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 1880464 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 1880464 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 501015 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 232475 |
| IRS990/PYInvestmentIncomeAmt | 0 | 5887 |
| IRS990/PYOtherExpensesAmt | 0 | 719295 |
| IRS990/PYOtherRevenueAmt | 0 | 66005 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 1709939 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -399337 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 1730413 |
| IRS990/PYTotalExpensesAmt | 0 | 2682183 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 2282846 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -157243 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 900 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 1885647 |
| IRS990ScheduleA/SchoolInd | 0 | X |
| 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/BuildingsGrp/BookValueAmt | 0 | 1947574 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 1499033 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 3446607 |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 271000 |
| IRS990ScheduleD/CYEndwmtFundGrp/ContributionsAmt | 0 | 150000 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 421000 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 146721 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/ContributionsAmt | 0 | 124279 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 271000 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 109500 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/ContributionsAmt | 0 | 37221 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 146721 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/ContributionsAmt | 0 | 109500 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 109500 |
| IRS990ScheduleD/EndowmentsHeldRelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/EndowmentsHeldUnrelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 73525 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 128843 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 202368 |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 296915 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 2356645 |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 1146000 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 1146000 |
| IRS990ScheduleD/OtherExpensesNotIncludedAmt | 0 | 296915 |
| IRS990ScheduleD/OtherRevenuesNotIncludedAmt | 0 | 296915 |
| IRS990ScheduleD/PrmnntEndowmentBalanceEOYPct | 0 | 1.00000 |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 296915 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 2199402 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | TO PROVIDE SCHOLARSHIPS FOR STUDENTS |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | STUDENT FINANCIAL AID 296,915. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 2 | STUDENT FINANCIAL AID 296,915. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART V, LINE 4: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART XI, LINE 4B - OTHER ADJUSTMENTS: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | PART XII, LINE 4B - OTHER ADJUSTMENTS: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 3167099 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 2653560 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 2496317 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 2199402 |
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