| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 13718 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 4309 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 445 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 95847 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | FOTO IS A PUBLIC BENEFIT ORGANIZATION CREATED TO SUPPORT & PROMOTE THE GRIFFITH OBSERVATORY. |
| IRS990/AllOtherContributionsAmt | 0 | 1092511 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 6863 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 4191 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 7885 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 18939 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | CAMILLE LOMBARDO |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2134730879 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | PO BOX 27310 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | LOS ANGELES |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 90027 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 369856 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 275214 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 63339 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 26743 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 50671 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 140753 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 4203 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 4203 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 1278723 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 185 |
| IRS990/CYOtherExpensesAmt | 0 | 2274800 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 34440 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -1531103 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 569651 |
| IRS990/CYTotalExpensesAmt | 0 | 2844451 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 175461 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 1313348 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 1479 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 1479 |
| IRS990/Desc | 0 | SUPPORT THE GRIFFITH OBSERVATORY IN ITS VARIOUS ASTRONOMICAL, SPACE, SCIENTIFIC AND EDUCATIONAL ACTIVITIES. IN ADDITION, THE ORGANIZATION RAISES FUNDS FOR THE DEVELOPMENT, MODERNIZATION AND IMPROVEMENT OF THE OBSERVATORY. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 9 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 2558177 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 26690 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 26690 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 7526 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 23892 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 31418 |
| 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 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 14 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 15 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 16 | 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 | 10753 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | DAVID PRIMES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | RICHARD SEMLER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | BRETT RODDA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | DR EVE HABERFIELD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | PATRICIA CASADO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | DR VERNA B DAUTERIVE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | LINDA DUTTENHAVER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | ETHAN ELLER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | SANDRA KANG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | CHRIS LAIB |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | ARNOLD SEIDEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | VICKE SELK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | CHARLES WILMOT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | BONNIE WININGS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | TERRI BLOOMGARDEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | LOWELL H ORREN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | ANDRE BORMANIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | CAMILLE LOMBARDO |
| 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 140000 |
| 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/TitleTxt | 0 | CHAIR OF THE BOARD |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | EXECUTIVE DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1978 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 17 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 1313348 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 16 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 4071 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 1665 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 9466 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 15202 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 185 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 185 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 7 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 46073 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 2715 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 2800 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 48873 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 186212 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | FOTO'S COMMITMENT IS IN HELPING THE GRIFFITH OBSERVATORY REMAIN A VITAL COMMUNITY CENTERPIECE OF LEARNING, EXPLORATION AND INSPIRATION AND TO CONTINUE TO BRING ASTRONOMY TO LIFE FOR MILLIONS OF VISITORS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 3097093 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1565990 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 3306 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 3306 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 5791 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 7983 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 14462 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 28236 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 5375 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 2136 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 19877 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 27388 |
| IRS990/OtherExpensesGrp/Desc | 0 | OBSERVATORY SUPPORT |
| IRS990/OtherExpensesGrp/Desc | 1 | EDUCATIONAL PROGRAMS |
| IRS990/OtherExpensesGrp/Desc | 2 | EVENTS AND PROGRAMS |
| IRS990/OtherExpensesGrp/Desc | 3 | OBSERVER EXPENSES |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 22215 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 1987931 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 86600 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 19248 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 22013 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 1987931 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 86600 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 41463 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 22013 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 15276 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 15569 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 46736 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 22169 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 288066 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 356971 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 8299 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 3696 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 26409 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 38404 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 6135 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 6135 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 71473 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 277000 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 9405 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 13003 |
| IRS990/PrincipalOfficerNm | 0 | RICHARD SEMLER |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | PROGRAM AND EVENT SALE |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 34440 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 34440 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 3339165 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 80 |
| IRS990/PYOtherExpensesAmt | 0 | 486440 |
| IRS990/PYOtherRevenueAmt | 0 | -64126 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 10904 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 2244618 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 554965 |
| IRS990/PYTotalExpensesAmt | 0 | 1041405 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 3286023 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -1531103 |
| 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 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 39440 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 2672193 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 922004 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | DESCRIPTION: TO ASSIST WITH PLANETARIUM EQUIPMENT UPGRADES. DATE: 10/31/14 AMOUNT: 2500000. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | SCHEDULE A, PART VI, LIST OF UNUSUAL GRANTS: |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 1278723 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 839165 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 679625 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1089993 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 718355 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 4605861 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 185 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 80 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 68 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 81 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 103 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 517 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 559799 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 39008 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 39008 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.55850 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.51640 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 2594583 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 2011278 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 1278723 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 839165 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 679625 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1089993 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 718355 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 4605861 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 4645386 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 2800 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 40822 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 43622 |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 2844451 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 0 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 5251 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 5251 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 15569 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | ACCRUED SALARIES AND BENEFITS |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 1313348 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE ORGANIZATION RECOGNIZES THE FINANCIAL STATEMENT BENEFIT OF TAX POSITIONS, SUCH AS ITS FILING STATUS AS TAX-EXEMPT, ONLY AFTER DETERMINING THAT THE RELEVANT TAX AUTHORITY WOULD MORE LIKELY THAN NOT SUSTAIN THE POSITIONS FOLLOWING AN AUDIT. THE ORGANIZATION IS SUBJECT TO POTENTIAL INCOME TAX AUDITS ON OPEN TAX YEARS BY ANY TAXING JURISDICTION IN WHICH IT OPERATES. THE STATUTE OF LIMITATIONS FOR FEDERAL PURPOSES IS THREE YEARS AND FOR CALIFORNIA PURPOSES IS FOUR YEARS. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART X, LINE 2: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 2800 |