| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 160202 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 339914 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | THE SCHOOL IS BUILT ON TEN DESIGN PRINCIPLES THAT REFLECT THE EDUCATIONAL VALUES AND BELIEFS OF NEW YORK CITY OUTWARD BOUND AND EXPEDITIONARY LEARNING. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 2377 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 2063 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 83601 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 88041 |
| IRS990/AllOtherContributionsAmt | 0 | 26538 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | GEOFFREY ROEHM |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 7182211064 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1580 DEAN STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | BROOKLYN |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | NY |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 11213 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 145795 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 893945 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 5901 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 130153 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 288786 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 424840 |
| 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/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 302327 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 1720 |
| IRS990/CYOtherExpensesAmt | 0 | 1217492 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 5337821 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 579283 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 3845093 |
| IRS990/CYTotalExpensesAmt | 0 | 5062585 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 21392 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 5641868 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 0 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 103950 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 546 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 5922 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 168371 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 174839 |
| IRS990/Desc | 0 | EXPENSES DIRECTLY ASSOCIATED WITH THE OPERATIONS OF THE CHARTER SCHOOL AND THE RELATED CURRICULUM COSTS. FOR THE 2014-2015 SCHOOL YEAR, WE SERVED APPROXIMATELY 303 STUDENTS IN SIXTH THROUGH EIGHTH GRADES. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 56 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 4792406 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 20250 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 20250 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 528 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 22850 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 343902 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 367280 |
| 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 | 2.00 |
| 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 | 65.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 65.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 65.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 50.00 |
| 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/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | 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 | 12852 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 525 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 5014 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 12852 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | JONATHAN HARBER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | GRACE LEE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | NICOLE LEMEROND |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | DAN GINSBURG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JONATHAN LATIMER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | NIC LIRETTE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | ANTHONY CONELLI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | GEOFFREY ROEHM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | EVAN KILGORE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | LAMAR KAUFFMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | RACHEL ROCKER |
| 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 | 103182 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 105302 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 84290 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 92723 |
| 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/TitleTxt | 0 | CHAIRMAN |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | EXECUTIVE DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | PRINCIPAL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR OF OPERATIONS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | DIRECTOR OF FINANCE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2010 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 7 |
| IRS990/GovernmentGrantsAmt | 0 | 275789 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 5641868 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 7 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 172 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 1866 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 53040 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 55078 |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 90 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 996 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 31632 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 32718 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 1720 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 1720 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 3 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 315213 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 418022 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 547492 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 862705 |
| IRS990/LegalDomicileStateCd | 0 | NY |
| 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 | LAUNCH EXPEDITIONARY LEARNING CHARTER SCHOOL (THE "SCHOOL") IS BUILT ON TEN DESIGN PRINCIPLES THAT REFLECT THE EDUCATIONAL VALUES AND BELIEFS OF NEW YORK CITY OUTWARD BOUND. THESE PRINCIPLES ALSO REFLECT THE DESIGN'S CONNECTION TO OTHER RELATED THINKING ABOUT TEACHING, LEARNING, AND THE CULTURE OF SCHOOLS. THE DESIGN PRINCIPLES ARE: PRIMACY OF SELF-DISCOVERY; HAVING WONDERFUL IDEAS; RESPONSIBILITY FOR LEARNING; EMPATHY AND CARING; SUCCESS AND FAILURE; COLLABORATION AND COMPETITION; DIVERSITY AND INCLUSION; NATURAL WORLD; SOLITUDE AND REFLECTION; AND SERVICE AND COMPASSION. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1810847 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 2390130 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoncashContributionsAmt | 0 | 6266 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 1552 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 3221 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 80894 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 85667 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 75103 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 75178 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 939 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 3091 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 339621 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 343651 |
| IRS990/OtherExpensesGrp/Desc | 0 | CLASSROOM SUPPLIES AND |
| IRS990/OtherExpensesGrp/Desc | 1 | STUDENT SERVICES |
| IRS990/OtherExpensesGrp/Desc | 2 | LOSS ON DISPOSAL OF ASS |
| IRS990/OtherExpensesGrp/Desc | 3 | REPAIRS AND MAINTENANCE |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 81 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 23 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 873 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 248 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 2955 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 244423 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 137955 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 7061 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 245377 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 137955 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 7332 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 2955 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 8120 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 41841 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 2774312 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 2824273 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 1017 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 11886 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 227863 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 240766 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 46 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 572 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 10945 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 11563 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 47060 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 39521 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 84334 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 75478 |
| IRS990/PrincipalOfficerNm | 0 | GEOFFREY ROEHM |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | GOV'T PER-PUPUL REV. |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 5337821 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 5337821 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 404415 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | -1397 |
| IRS990/PYOtherExpensesAmt | 0 | 708999 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 3642810 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 970177 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 2366652 |
| IRS990/PYTotalExpensesAmt | 0 | 3075651 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 4045828 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 579283 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 5337821 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 1200735 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 1202380 |
| 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/DonatedServicesAndUseFcltsAmt | 0 | 96817 |
| IRS990ScheduleD/DonatedServicesUseFcltsAmt | 0 | 96817 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 207795 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 184241 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 392036 |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 96817 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 5062585 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 245193 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 97907 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 343100 |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 94504 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 33065 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 127569 |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 96817 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 5641868 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE SCHOOL'S ACCOUNTING POLICY PROVIDES THAT A TAX EXPENSE OR BENEFIT FROM AN UNCERTAIN TAX POSITION MAY BE RECOGNIZED WHEN IT IS MORE LIKELY THAN NOT THAT THE POSITION WILL BE SUSTAINED UPON EXAMINATION, INCLUDING RESOLUTIONS OF ANY RELATED APPEALS OR LITIGATION PROCESSES, BASED ON THE TECHNICAL MERITS. THE SCHOOL HAS NO UNCERTAIN TAX POSITION RESULTING IN AN ACCRUAL OF TAX EXPENSE OR BENEFIT. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART X, LINE 2: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 547492 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 5062585 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 5641868 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 5738685 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 5159402 |
| IRS990ScheduleE/ComplianceWithRevProc7550Ind | 0 | 1 |
| IRS990ScheduleE/DiscriminateRaceAdmissPlcyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceAthltProgInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceEducPlcyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceEmplmFcultyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceOtherActyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceSchsInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceStdntsRghtsInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceUseOfFcltsInd | 0 | 0 |
| IRS990ScheduleE/GovernmentFinancialAidRcvdInd | 0 | 1 |
| IRS990ScheduleE/GovernmentFinancialAidRvkdInd | 0 | 0 |
| IRS990ScheduleE/MaintainCpyOfAllSolInd | 0 | 1 |
| IRS990ScheduleE/MaintainCpyOfBrochuresEtcInd | 0 | 1 |
| IRS990ScheduleE/MaintainRacialCompRecsInd | 0 | 1 |
| IRS990ScheduleE/MaintainScholarshipsRecsInd | 0 | 0 |
| IRS990ScheduleE/NondiscriminatoryPolicyStmtInd | 0 | 1 |
| IRS990ScheduleE/PlcyPblczdViaBroadcastMediaInd | 0 | 1 |
| IRS990ScheduleE/PolicyStmtInBrochuresEtcInd | 0 | 1 |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 0 | THE SCHOOL DISSEMINATES ITS POLICY ON OUTREACH MATERIALS, APPLICATIONS, AND ITS WEBSITE. |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 1 | 4A) THE SCHOOL MAINTAINS RACIAL COMPOSITION OF STUDENT BODY NOT OF FACULTY AND ADMINISTRATIVE STAFF. 4B) THE SCHOOL IS A FREE PUBLIC SCHOOL AND DOES NOT AWARD SCHOLARSHIPS OR FINANCIAL ASSISTANCE. |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 2 | THE SCHOOL RECEIVES PER-PUPIL FUNDING FROM THE NYC BOARD OF EDUCATION UNDER THEIR CHARTER AGREEMENT. THE SCHOOL ALSO RECEIVES VARIOUS FEDERAL, STATE, AND CITY FUNDS INCLUDING FEDERAL ENTITLEMENTS TO ASSIST WITH COVERING THE COST OF CERTAIN PROGRAMS. |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE E, PART I, LINE 3 |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | SCHEDULE E, PART I, LINE 4 |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | SCHEDULE E, PART I, LINE 6 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | FORM 990 IS REVIEWED BY MANAGEMENT AND THE FINANCE COMMITTEE OF THE BOARD OF TRUSTEES FOR APPROVAL. IF CHANGES ARE REQUIRED THE SCHOOL WILL THEN FORWARD TO THE AUDITING FIRM AND A FINAL VERSION WILL BE DISTRIBUTED TO ALL BOARD MEMBERS PRIOR TO IRS SUBMISSION. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | THE SCHOOL SHARES ITS CONFLICT OF INTEREST POLICY WITH BOARD MEMBERS AND OFFICERS AS PART OF THEIR REGULAR MEETINGS. OFFICERS, DIRECTORS, AND KEY EMPLOYEES ARE EXPECTED TO DECLARE IF AT ANY POINT A CONFLICT OF INTEREST ARISES. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | COMPARABLE DATA IS USED BY THE BOARD WHEN DETERMINING THE COMPENSATION OF OFFICERS AND KEY EMPLOYEES. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | UPON REQUEST, THE SCHOOL MAKES AVAILABLE TO THE PUBLIC ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | THE SCHOOL HAS A FINANCE COMMITTEE THAT IS RESPONSIBLE FOR OVERSIGHT OF THE AUDIT AND SELECTION OF THE INDEPENDENT AUDITOR. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 12C |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION B, LINE 15 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PART XII, FINANCIAL STATEMENTS AND REPORTING, LINE 2C: |
| IRS990/SchoolOperatingInd | 0 | 1 |
| IRS990/SignificantChangeInd | 0 | 0 |
| IRS990/SignificantNewProgramSrvcInd | 0 | 0 |
| IRS990/SubjectToProxyTaxInd | 0 | 0 |
| IRS990/TaxablePartyNotificationInd | 0 | 0 |
| IRS990/TaxExemptBondsInd | 0 | 0 |
| IRS990/TemporarilyRstrNetAssetsGrp/BOYAmt | 0 | 3130 |
| IRS990/TemporarilyRstrNetAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/TempOrPermanentEndowmentsInd | 0 | 0 |
| IRS990/TerminateOperationsInd | 0 | 0 |
| IRS990/TotalAssetsBOYAmt | 0 | 1971049 |
| IRS990/TotalAssetsEOYAmt | 0 | 2833994 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 1971049 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 2833994 |
| IRS990/TotalCompGreaterThan150KInd | 0 | 0 |
| IRS990/TotalContributionsAmt | 0 | 302327 |
| IRS990/TotalEmployeeCnt | 0 | 56 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 21392 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 248787 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 4792406 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 5062585 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 160202 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 443864 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 160202 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 443864 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 1810847 |