| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 4216532 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 4132767 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 200638 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 453668 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | High Tech High provides education to students in grades K-12 through the operation of its public charter schools. High Tech High operated twelve public charter schools in 2014-15. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 407 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 2265 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 2672 |
| IRS990/AllAffiliatesIncludedInd | 0 | false |
| IRS990/AllOtherContributionsAmt | 0 | 628343 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 0 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | Kay McElrath |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6198145084 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 2861 Womble Road |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | San Diego |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 92106 |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 630917 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 2152909 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 966783 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 966783 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | true |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | true |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 2690 HISTORIC DECATUR ROAD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 600 W BROADWAY 2600 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | SAN DIEGO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | SAN DIEGO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 92106 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 92101 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | BANYAN CATERING |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | MCKENNA LONG & ALDRIDGE LLP |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | STUDENT MEALS |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | LEGAL - BOND/PROP. |
| IRS990/ContriRptFundraisingEventAmt | 0 | 56808 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 45080262 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 344541 |
| IRS990/CYOtherExpensesAmt | 0 | 16259677 |
| IRS990/CYOtherRevenueAmt | 0 | 193698 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 1882975 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 412890 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 30828909 |
| IRS990/CYTotalExpensesAmt | 0 | 47088586 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 93991 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 47501476 |
| IRS990/DAFExcessBusinessHoldingsInd | 0 | false |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 252017 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 142019 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 1701583 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 1701583 |
| IRS990/Desc | 0 | OPERATION OF PUBLIC CHARTER SCHOOLS: In 2014-15, over 5,000 students attended High Tech High operated public charter schools in grades K-12. High Tech High's students graduate with 100% of the 'a-g' requirements for University of California admission satisfied. This compares to roughly 1/3 of high school students throughout the state of California. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DistributionToDonorInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 775 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/EscrowAccountInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 36594066 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditPerformedInd | 0 | true |
| IRS990/FederalGrantAuditRequiredInd | 0 | true |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 59455 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 1500 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 60955 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 112199 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 16776 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 128975 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 1833 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 543034 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 1359572 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 1904439 |
| 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/Form1098CFiledInd | 0 | false |
| IRS990/Form8282FiledCnt | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 8.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 7.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 6.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 10 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 11 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 12 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 42.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 42.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 54.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 42.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | 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 | 57226 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 21076 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 27787 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 14673 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 12140 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 15880 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 21709 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 20387 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 14248 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | GARY JACOBS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | KAY DAVIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | MICHAEL MCGRAW |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Melissa Ratcliff |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | LARRY ROSENSTOCK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | BEN DALEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Kay McElrath |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | Maria Heredia |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ROBERT RIORDAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | Mike Seal |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | Paul Dooley |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | Amy Reising |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | Brett Peterson |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 331304 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 170705 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 199032 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 144980 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 131553 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 115005 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 114862 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 109883 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 105142 |
| 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/TitleTxt | 0 | chair |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Secretary |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | principal/ceo |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | CAO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | CFO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | COO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | GSE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | School Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | Facilities Dir. |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | Teacher Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | School Director |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/Form990TFiledInd | 0 | false |
| IRS990/FormationYr | 0 | 1999 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/ConsolAndSepBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingAmt | 0 | 56808 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 22261 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 65407 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 5 |
| IRS990/GovernmentGrantsAmt | 0 | 41941144 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 47523737 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 4749 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | true |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 5 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 12 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 1872 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 5364 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 153446 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 160682 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 217789 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 685 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 218474 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 133285 |
| IRS990/InterestGrp/TotalAmt | 0 | 133285 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 344541 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 344541 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/BOYAmt | 0 | 4479461 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 4530523 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 0 |
| IRS990/InvestTaxExemptBondsInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 105 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 5833691 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 36830420 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 39535890 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 45369581 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LicensedMoreThanOneStateInd | 0 | false |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | true |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | High Tech High's mission is develop and support innovative public schools where all students develop the academic, workplace and citizenship skills for postsecondary success. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 26998528 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 27411418 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 43894 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 43146 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 4749 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 4749 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 1134103 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 5648530 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 6782633 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 21850 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 149466 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 1036032 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 1207348 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OnBehalfOfIssuerInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OrgFiledInLieuOfForm1041Ind | 0 | false |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 6082559 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 3023686 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 4941 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 355041 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 1975706 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 2335688 |
| IRS990/OtherExpensesGrp/Desc | 0 | Books and Supplies |
| IRS990/OtherExpensesGrp/Desc | 1 | Student Transportation |
| IRS990/OtherExpensesGrp/Desc | 2 | DUES AND SUBSCRIPTIONS |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 5435 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 675052 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 31457 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 2346006 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 491334 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 2905 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 3026493 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 491334 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 34362 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 29853225 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 28312319 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 1 | 221000 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 2 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | AFFILIATE ASSET TRANSFER |
| IRS990/OtherRevenueMiscGrp/Desc | 1 | ENERGY INCENTIVE/REBATE |
| IRS990/OtherRevenueMiscGrp/Desc | 2 | MICROSOFT SETTLEMENT |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 0 | 7900 |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 1 | 83125 |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 2 | 54778 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 7900 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 1 | 83125 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 2 | 54778 |
| IRS990/OtherRevenueTotalAmt | 0 | 145803 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 49708 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 3595551 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 19814762 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 23460021 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/OwnWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PaymentsToAffiliatesGrp/ProgramServicesAmt | 0 | 112536 |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 112536 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 2306 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 205968 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 922114 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 1130388 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 6046 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 506765 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 2423218 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 2936029 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 6758898 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 4101500 |
| IRS990/PoliciesReferenceChaptersInd | 0 | true |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 1202385 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 1025537 |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611710 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 624410 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 611430 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 3 | 611710 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 4 | 611430 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | AFTERSCHOOL PROGRAM |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | CHILD CARE PROGRAM |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | CREDENTIALING FEES |
| IRS990/ProgramServiceRevenueGrp/Desc | 3 | STUDENT TRAVEL INCOME |
| IRS990/ProgramServiceRevenueGrp/Desc | 4 | TECHNICAL ASSISTANCE |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 150223 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 412911 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 221147 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 3 | 227412 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 4 | 450910 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 150223 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 412911 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 221147 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 3 | 227412 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 4 | 450910 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | CREATION OF NEW SCHOOLS: During 2014-15, High Tech High prepared for the opening of its 13th school (fall 2015 opening). Four hundred students were selected by lottery in March 2015. The facility to be used for the new school was nearing completion at the close of the tax year. The facility was financed and built by High Tech High's parent organization, HTH Learning. |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 39864866 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 324294 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 14855358 |
| IRS990/PYOtherRevenueAmt | 0 | 43201 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 1439511 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 344971 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 26471543 |
| IRS990/PYTotalExpensesAmt | 0 | 41326901 |