| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 425930 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 433044 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 2647534 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 2637100 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | BAKER IS AN ELEMENTARY SCHOOL THAT CHAMPIONS AN EXEMPLARY PROGRESSIVE EDUCATION. SEE PART III. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 7203 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 14405 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 50419 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 72027 |
| IRS990/AllOtherContributionsAmt | 0 | 430163 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 4131 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 22682 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 26813 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | GARY GRAN |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 8474255800 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 201 SHERIDAN ROAD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | CHICAGO |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | IL |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 60091 |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 715185 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 106838 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 14966 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 30760 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 282726 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 328452 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | true |
| IRS990/ConferencesMeetingsGrp/FundraisingAmt | 0 | 818 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 842 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 1660 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 291301 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 175883 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 116 W ILLINOIS 7TH FLOOR |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 2204 N MOBILE AVENUE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | CHICAGO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | CHICAGO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | IL |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | IL |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 60654 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 60639 |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 0 | LAKOTA GROUP INC |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 1 | MGR CLEANING SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | ARCHITECTURAL SERVS |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | CLEANING SERVICES |
| IRS990/ContriRptFundraisingEventAmt | 0 | 113628 |
| IRS990/CostOfGoodsSoldAmt | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 543791 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 1204025 |
| IRS990/CYInvestmentIncomeAmt | 0 | 28420 |
| IRS990/CYOtherExpensesAmt | 0 | 1429657 |
| IRS990/CYOtherRevenueAmt | 0 | -6831 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 6401655 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -79763 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 4413116 |
| IRS990/CYTotalExpensesAmt | 0 | 7046798 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 258720 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 6967035 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 4389239 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 4163277 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 3874 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 34867 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 219536 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 258277 |
| IRS990/Desc | 0 | DAY AND SUMMER ELEMENTARY EDUCATION THROUGH A RESEARCH-BASED CURRICULUM THAT PROMOTES ACADEMIC EXCELLENCE. THERE WERE APPROXIMATELY 318 STUDENTS DURING THE SCHOOL YEAR AND 256 DURING SUMMER SCHOOL. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 123 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/EscrowAccountInd | 0 | false |
| IRS990/EscrowAccountLiabilityGrp/BOYAmt | 0 | 0 |
| IRS990/EscrowAccountLiabilityGrp/EOYAmt | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 6097900 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 7369 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 66324 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 12731 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 86424 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 10931 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 89416 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 24208 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 124555 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 10 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 11 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 12 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 13 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 14 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 15 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 16 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 17 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 18 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 3.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 40.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 40.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 40.0 |
| 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/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/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 | 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/OtherCompensationAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 10894 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 8606 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | Jonathan Cowan |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Tammy Ho |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Jeffrey O'Koon |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Jay Robinson |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | Matthew Rooney |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Stacey Empson |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Ralph Walsh |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | Michael Doornweerd |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | Charis Irving |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | Ade Patton |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | Elizabeth Gillette |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | Bill Michalski |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | Kim Ptak |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | Lisa Sparrow |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | Alexa Starr |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | Shane Winn |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | Daniel Schwartz |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | Arona Puttrich |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | Gena Johnson |
| 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/ReportableCompFromOrgAmt | 16 | 220000 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 108452 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 18 | 100944 |
| 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/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | Treasurer/Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | Secretary/Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | President/Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | Vice President/Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | Head of School |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | Director of Finance & Oper |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | Director of Advancement |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/FormationYr | 0 | 2004 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingAmt | 0 | 113628 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 41250 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 17372 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 24357 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GamingDirectExpensesAmt | 0 | 0 |
| IRS990/GamingGrossIncomeAmt | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 16 |
| IRS990/GrantAmt | 0 | 1204025 |
| IRS990/GrantsPayableGrp/BOYAmt | 0 | 0 |
| IRS990/GrantsPayableGrp/EOYAmt | 0 | 0 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 1204025 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 1204025 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | true |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 256963 |
| IRS990/GrossReceiptsAmt | 0 | 7240891 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 0 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | true |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 16 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 3 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 512 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 4611 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 29030 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 34153 |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 1165 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 5288 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 37984 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 44437 |
| IRS990/IntangibleAssetsGrp/BOYAmt | 0 | 0 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/FundraisingAmt | 0 | -1058 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | -9526 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | -59978 |
| IRS990/InterestGrp/TotalAmt | 0 | -70562 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 4063 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 4063 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/BOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 262769 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 254047 |
| IRS990/InvestTaxExemptBondsInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 42 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 2529416 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 8694569 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 8620849 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 11150265 |
| IRS990/LegalDomicileStateCd | 0 | IL |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 232606 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LoansFromOfficersDirectorsGrp/BOYAmt | 0 | 0 |
| IRS990/LoansFromOfficersDirectorsGrp/EOYAmt | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | TO CHAMPION AN EXEMPLARY PROGRESSIVE EDUCATION, WHICH CULTIVATES AN INTRINSIC MOTIVATION TO LEARN, VALUES DIFFERENCES, NURTURES THE WHOLEPERSON, AND ENCOURAGES COURAGEOUS CHOICES. BAKER WILL BE WIDELY RECOGNIZED AS THE LEADING PROGRESSIVE SCHOOL IN THE GREATER CHICAGO AREA THAT GRADUATES STUDENTS WHO LOVE TO LEARN, CHERISH THE JOURNEY AND SERVE THE WORLD. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 119306 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 63296 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1969838 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1885579 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 24357 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 24357 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | -23878 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | -23878 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -4496 |
| IRS990/NoncashContributionsAmt | 0 | 17435 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 2279 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 20516 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 129174 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 151969 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 12994 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 7742 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 16536 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 37272 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OnBehalfOfIssuerInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 0 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 8100 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 11735 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 24119 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 268267 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 304121 |
| IRS990/OtherExpensesGrp/Desc | 0 | EDUCATIONAL EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 1 | REPAIRS AND MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 2 | BANK FEES |
| IRS990/OtherExpensesGrp/Desc | 3 | MISCELLANEOUS |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 4811 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 3829 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 4963 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 3 | 761 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 34459 |