| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 370316 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 111819 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | TO ADVANCE UNDERSTANDING OF THE DYNAMIC UNIVERSE BY ENABLING LSST SCIENCE THROUGH RESEARCH AND EDUCATION |
| IRS990/AllOtherContributionsAmt | 0 | 127137 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | AURA INC |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5203188000 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 950 N CHERRY AVE |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | TUCSON |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | AZ |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 85719 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 187639 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 187639 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 102007 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 102007 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 1016625 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 411544 |
| IRS990/CYInvestmentIncomeAmt | 0 | 38598 |
| IRS990/CYOtherExpensesAmt | 0 | 547246 |
| IRS990/CYOtherRevenueAmt | 0 | 36370 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -54836 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 187639 |
| IRS990/CYTotalExpensesAmt | 0 | 1146429 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 1091593 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 2299301 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 2573022 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | PARTNERING WITH NSF (AURA) AND DOE (SLAC) IN THE CONSTRUCTION OF THE LSST TELESCOPE, CAMERA AND DATA MANAGEMENT SYSTEM, AND ENGAGING INTERNATIONAL PARTNERS IN THE OPERATION OF THE LSST FACILITY AND ITS DATA ACCESS CENTERS, AND ENABLING THE FULL SCIENCE EXPLOITATION OF THE UNIQUE LSST DATA SET THROUGH COORDINATION AND PREPARATION OF THE MEMBER INSTITUTIONS, THE BROADER PHYSICS AND ASTRONOMY COMMUNITY AND OUR INTERNATIONAL PARTNERS. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 426741 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 13500 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 13500 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 750 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 750 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 277067 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 277067 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignGrantsGrp/ProgramServicesAmt | 0 | 13500 |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 13500 |
| 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 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 8.00 |
| 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/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 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 | 33866 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 26090 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | DAVID MACFARLANE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | BUELL JANNUZI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | PATRICIA BURCHAT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JOSH FRIEMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | SUZANNE HAWLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | CONSTANCE ROCKOSI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MICHAEL STRAUSS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | ADAM BOLTON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | HENRI FERGUSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | LARRY GLADNEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | VICKY KALOGERA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | EZEQUIEL TREISTER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | IAN SHIPSEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | PATRICIA ELIASON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | DANIEL CALABRESE |
| 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/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 | 126739 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 130465 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | VICE CHAIRMAN |
| 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 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | EXECUTIVE OFFICER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | CORPORATE SECRETARY |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2003 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 13 |
| IRS990/GovernmentGrantsAmt | 0 | 149985 |
| IRS990/GrantAmt | 0 | 411544 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 398044 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 398044 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 1 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 1091593 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 13 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 5590 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 5590 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 38598 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 38598 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | AZ |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 739503 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 0 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | TO ADVANCE UNDERSTANDING OF THE DYNAMIC UNIVERSE BY ENABLING LSST SCIENCE THROUGH RESEARCH AND EDUCATION. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 1 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 2345851 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 2291015 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 5794 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 5794 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | MISCELLANEIOUS |
| IRS990/OtherExpensesGrp/Desc | 1 | SUPPLIES |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 65203 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 2791 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 5325 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 9872 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 70528 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 12663 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | MISC INCOME |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 36370 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 36370 |
| IRS990/OtherRevenueTotalAmt | 0 | 36370 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 150000 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 114583 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | PATRICIA ELIASON |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 785895 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 548118 |
| IRS990/PYInvestmentIncomeAmt | 0 | 12149 |
| IRS990/PYOtherExpensesAmt | 0 | 362777 |
| IRS990/PYOtherRevenueAmt | 0 | 23853 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -267095 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 178097 |
| IRS990/PYTotalExpensesAmt | 0 | 1088992 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 821897 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -54836 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 0 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 36370 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 4865468 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 4861273 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | MISCELLANEOUS REVENUE |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 1 | LSST IS A COLLABORATION OF A NUMBER OF NATIONAL LABS AND OTHER ORGANIZATIONS FOR THE PURPOSE OF CONSTRUCTING AND OPERATING A LARGE SYNOPTIC SURVEY TELESCOPE. IN REVIEWING THE LIST OF MEMBER ORGANIZATIONS AT 9/30/2018, THEY CONSIST OF NATIONAL LABS, PUBLIC UNIVERSITIES, THE REPUBLIC OF CHILE, AND OTHER RESEARCH AND SIMILAR ORGANIZATIONS. ALL DATA COLLECTED BY THE TELESCOPE WILL BE MADE PUBLIC. THE MEMBER ORGANIZATIONS ARE NOT THE DIRECT BENEFICIARIES OF THE TELESCOPE, BUT THEIR STUDENTS, SCIENTISTS AND THE GENERAL PUBLIC ARE THE BENEFICIARIES OF THE MEMBERSHIP CONTRIBUTIONS AND THE CONSTRUCTION AND OPERATION OF THE TELESCOPE THAT THESE CONTRIBUTIONS SUPPORT. BASED UPON THE IRS FORM 990 INSTRUCTIONS, MEMBER CONTRIBUTIONS ARE REPORTED ON LINE 1B. SCHEDULE A, PART II, LINE 1 WAS RESTATED FOR THE 2013, 2014, AND 2015 REPORTING YEARS. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | SCHEDULE A, PART II, LINE 10, EXPLANATION OF OTHER INCOME: |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 1 | SCHEDULE A, PART II, LINE 1 AND LINE 12: |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 1016625 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 785895 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 1486397 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 873000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 875000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 5036917 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 38598 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 12149 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 2080 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1029 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 949 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 54805 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 69125 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 10412 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 10412 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.92920 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.93370 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 4741003 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 295914 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 1016625 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 785895 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 1486397 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 873000 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 875000 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 5036917 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 5102134 |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/DonatedServicesAndUseFcltsAmt | 0 | 12484 |
| IRS990ScheduleD/DonatedServicesUseFcltsAmt | 0 | 12484 |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 12484 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 1146429 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 12484 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 1091593 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | LSST HAS BEEN RECOGNIZED BY THE INTERNAL REVENUE SERVICE AS A 501(C)(3) ORGANIZATION EXEMPT FROM FEDERAL INCOME TAXES. UNDER INTERNAL REVENUE CODE SECTION 501(A), LSST FOLLOWS THE INCOME TAX STANDARD FOR UNCERTAIN TAX POSITIONS. ACCORDINGLY, NO PROVISION FOR FEDERAL AND STATE INCOME TAXES HAS BEEN MADE IN THE ACCOMPANYING FINANCIAL STATEMENTS. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART X, LINE 2: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 0 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 1146429 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 1091593 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 1104077 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 1158913 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/EmployeeCnt | 0 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/EmployeeCnt | 1 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/OfficesCnt | 0 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/OfficesCnt | 1 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTotalExpendituresAmt | 0 | 5000 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTotalExpendituresAmt | 1 | 8500 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTxt | 0 | SOUTH AMERICA |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTxt | 1 | EUROPE |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/TypeOfActivitiesConductedTxt | 0 | GRANTS TO RECIPIENTS LOCATED IN REGION |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/TypeOfActivitiesConductedTxt | 1 | GRANTS TO RECIPIENTS LOCATED IN REGION |
| IRS990ScheduleF/BoycottCountriesInd | 0 | 0 |
| IRS990ScheduleF/ContinuationSpentAmt | 0 | 0 |
| IRS990ScheduleF/ContinuationTotalEmployeeCnt | 0 | 0 |
| IRS990ScheduleF/ContinuationTotalOfficeCnt | 0 | 0 |
| IRS990ScheduleF/ForeignCorpOwnershipInd | 0 | 0 |
| IRS990ScheduleF/ForeignPartnershipInd | 0 | 0 |
| IRS990ScheduleF/GrantRecordsMaintainedInd | 0 | 1 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/CashGrantAmt | 0 | 5000 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/CashGrantAmt | 1 | 8500 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/MannerOfCashDisbursementTxt | 0 | EFT |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/MannerOfCashDisbursementTxt | 1 | EFT |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/PurposeOfGrantTxt | 0 | SCIENTIFIC RESEARCH IN CHILE |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/PurposeOfGrantTxt | 1 | SCIENTIFIC RESEARCH FOR DESC SCIENCE ROADMAP IMPLEMENTATION |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/RegionTxt | 0 | SOUTH AMERICA |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/RegionTxt | 1 | EUROPE (INCLUDING ICELAND & GREENLAND) |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/ValuationMethodUsedDesc | 0 | BOOK |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/ValuationMethodUsedDesc | 1 | BOOK |
| IRS990ScheduleF/InterestInForeignTrustInd | 0 | 0 |
| IRS990ScheduleF/PassiveForeignInvestmestCoInd | 0 | 0 |
| IRS990ScheduleF/SubtotalEmployeesCnt | 0 | 0 |
| IRS990ScheduleF/SubtotalOfficesCnt | 0 | 0 |
| IRS990ScheduleF/SubtotalSpentAmt | 0 | 13500 |
| IRS990ScheduleF/SupplementalInformationDetail/ExplanationTxt | 0 | REQUEST FINAL REPORTS (NARRATIVE AND FINANCIAL) WITHIN 30 DAYS OF COMPLETION OF GRANT'S PROJECT TIME PERIOD. |
| IRS990ScheduleF/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART I, LINE 2: |
| IRS990ScheduleF/Total501c3OrgCnt | 0 | 2 |
| IRS990ScheduleF/TotalEmployeeCnt | 0 | 0 |
| IRS990ScheduleF/TotalOfficeCnt | 0 | 0 |
| IRS990ScheduleF/TotalSpentAmt | 0 | 13500 |
| IRS990ScheduleF/TransferToForeignCorpInd | 0 | 0 |
| IRS990ScheduleI/GrantRecordsMaintainedInd | 0 | 1 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 0 | 26880 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 1 | 7000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 2 | 5000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 3 | 12880 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 4 | 7000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 5 | 15000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 6 | 5610 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 7 | 38938 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 8 | 10000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 9 | 25000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 10 | 22004 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 11 | 23150 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 12 | 12960 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 13 | 11000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 14 | 5000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 15 | 24122 |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 0 | 501(C)(3) |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 1 | 501(C)(3) |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 2 | 501(C)(3) |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 3 | 501(C)(3) |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 4 | 501(C)(3) |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 5 | SECTION 115 |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 6 | SECTION 115 |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 7 | 501(C)(3) |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 8 | SECTION 115 |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 9 | 501(C)(3) |