| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 292032 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 370316 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | ADVANCING RESEARCH AND EDUCATION BY COLLABORATING IN THE CONSTRUCTION AND OPERATION OF AN OBSERVATORY HOUSING AN ASTRONOMICAL TELESCOPE TO BE KNOW AS THE LARGE SYNOPTIC SURVEY TELESCOPE (LSST). |
| IRS990/AllOtherContributionsAmt | 0 | 500 |
| 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/CashNonInterestBearingGrp/BOYAmt | 0 | 100 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 132862 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 45235 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 178097 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 103939 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 103939 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 785895 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 548118 |
| IRS990/CYInvestmentIncomeAmt | 0 | 12149 |
| IRS990/CYOtherExpensesAmt | 0 | 362777 |
| IRS990/CYOtherRevenueAmt | 0 | 23853 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -267095 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 178097 |
| IRS990/CYTotalExpensesAmt | 0 | 1088992 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 821897 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 454816 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 2299301 |
| 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 | 598745 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 23300 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 23300 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 1125 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 1125 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 117352 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 117352 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignGrantsGrp/ProgramServicesAmt | 0 | 64000 |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 64000 |
| 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 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 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/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/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 | 20726 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 5033 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | DAVID MACFARLANE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | BUELL JANNUZI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ROBERT SHELTON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | PATRICIA BURCHAT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JOSH FRIEMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | SUZANNE HAWLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | CONSTANCE ROCKOSI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | ED SEIDEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | MICHAEL STRAUSS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | ADAM BOLTON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | HENRI FERGUSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | LARRY GLADNEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | SUSAN HUTCHISON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | VICKY KALOGERA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | FARNAZ KHADEM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | EZEQUIEL TREISTER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | PATRICIA ELIASON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | 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/ReportableCompFromOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 122894 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 25338 |
| 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 | CHAIRMAN OF THE BOARD |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE CHAIRMAN |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD MEMBER |
| 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 | EXECUTIVE OFFICER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | 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 | 16 |
| IRS990/GrantAmt | 0 | 548118 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 484118 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 484118 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 1 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 821897 |
| 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/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 4534 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 4534 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 12149 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 12149 |
| 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 | 785395 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 0 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | ADVANCING RESEARCH AND EDUCATION BY COLLABORATING IN THE CONSTRUCTION AND OPERATION OF AN OBSERVATORY HOUSING AN ASTRONOMICAL TELESCOPE TO BE KNOWN AS THE LARGE SYNOPTIC SURVEY TELESCOPE (LSST). |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 1 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 2612946 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 2345851 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 5545 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 5545 |
| 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 | 65902 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 492 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 4161 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 18 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 70063 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 510 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | MISC INCOME |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 23853 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 23853 |
| IRS990/OtherRevenueTotalAmt | 0 | 23853 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 50000 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 150000 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | PATRICIA ELIASON |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 1486397 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 237675 |
| IRS990/PYInvestmentIncomeAmt | 0 | 2080 |
| IRS990/PYOtherExpensesAmt | 0 | 700813 |
| IRS990/PYOtherRevenueAmt | 0 | 8902 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 407558 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 151333 |
| IRS990/PYTotalExpensesAmt | 0 | 1089821 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 1497379 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -267095 |
| 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 | 23853 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 3309694 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 4865468 |
| 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 9/30/2017, 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, IT IS MORE APPROPRIATE TO REPORT THE MEMBER CONTRIBUTIONS ON LINE 1B IN PART VIII RATHER THAN AS PROGRAM SERVICES ON LINE 2A. SCHEDULE A, PART II, LINE 1 HAS BEEN RESTATED FOR ALL THE YEARS PRESENTED TO REFLECT THIS CHANGE IN REPORTING AS HAS LINE 12. |
| 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 | 785895 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 1486397 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 873000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 875000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 925000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 4945292 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 12149 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 2080 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 1029 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 949 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 2051 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 18258 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 32755 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 10412 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 10412 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.93370 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.89680 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 4644250 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 301042 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 785895 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 1486397 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 873000 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 875000 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 925000 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 4945292 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 4973962 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/DonatedServicesAndUseFcltsAmt | 0 | 12484 |
| IRS990ScheduleD/DonatedServicesUseFcltsAmt | 0 | 12484 |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 12484 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 1088992 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 12484 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 821897 |
| 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 | 1088992 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 821897 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 834381 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 1101476 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/EmployeeCnt | 0 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/EmployeeCnt | 1 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/EmployeeCnt | 2 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/OfficesCnt | 0 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/OfficesCnt | 1 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/OfficesCnt | 2 | 0 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTotalExpendituresAmt | 0 | 5000 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTotalExpendituresAmt | 1 | 24000 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTotalExpendituresAmt | 2 | 35000 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTxt | 0 | SOUTH AMERICA |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTxt | 1 | EUROPE |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTxt | 2 | NORTH AMERICA |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/TypeOfActivitiesConductedTxt | 0 | GRANTS TO RECIPIENTS LOCATED IN REGION |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/TypeOfActivitiesConductedTxt | 1 | GRANTS TO RECIPIENTS LOCATED IN REGION |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/TypeOfActivitiesConductedTxt | 2 | GRANTS TO RECIPIENTS LOCATED IN REGION |
| IRS990ScheduleF/BoycottCountriesInd | 0 | 0 |
| IRS990ScheduleF/ContinuationSpentAmt | 0 | 0 |
| IRS990ScheduleF/ContinutationTotalEmployeeCnt | 0 | 0 |
| IRS990ScheduleF/ContinutationTotalOfficeCnt | 0 | 0 |
| IRS990ScheduleF/ForeignCorpOwnershipInd | 0 | 0 |
| IRS990ScheduleF/ForeignPartnershipInd | 0 | 0 |
| IRS990ScheduleF/GrantRecordsMaintainedInd | 0 | 1 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/CashGrantAmt | 0 | 15000 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/CashGrantAmt | 1 | 35000 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/CashGrantAmt | 2 | 9000 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/MannerOfCashDisbursementTxt | 0 | EFT |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/MannerOfCashDisbursementTxt | 1 | EFT |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/MannerOfCashDisbursementTxt | 2 | EFT |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/PurposeOfGrantTxt | 0 | 2016-11: GETTING READY FOR DOING SCIENCE WITH LSST DATA: COMPUTING AND DATA ANALYSIS WORKSHOP |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/PurposeOfGrantTxt | 1 | 2017-03: THE 2017 CLASSIFICATION CHALLENGE: AN LSST PHOTOMETRIC CLASSIFICATION CHALLENGE |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/PurposeOfGrantTxt | 2 | 2017-04: STATISTICAL CHALLENGE FOR LARGE-SCALE STRUCTURE |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/RegionTxt | 0 | EUROPE |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/RegionTxt | 1 | NORTH AMERICA |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/RegionTxt | 2 | EUROPE |