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| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 14584 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 2175 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | CATAPULTS MISSION IS TO SUPPORT TECHNOLOGY START UPS THROUGH LOW COST OFFICE SPACE |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 2618 |
| IRS990/AllOtherContributionsAmt | 0 | 127082 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | CAITLIN MCALLISTER |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 3128600950 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 321 N CLARK ST NO 2550 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | CHI |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | IL |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 60654 |
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| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 66333 |
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| IRS990/Desc | 0 | PROVIDE AFFORDABLE OFFICE SPACE TO CHICAGO BASED TECHNOLOGY STARTUPS IN DOWNTOWN , CLASS A OFFICE. |
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| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
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| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 439 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 005.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 005.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 040.00 |
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| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
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| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | LISA CONMY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | BRIAN CODY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | CRAIG VODNIK |
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| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
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| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
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| IRS990/IndoorTanningServicesInd | 0 | 0 |
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| IRS990/MembersOrStockholdersInd | 0 | 0 |
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| IRS990/MissionDesc | 0 | CATAPULT[:QUOTE:]S NBSP;MISSION NBSP;IS NBSP;TO NBSP;SUPPORT NBSP;AND NBSP;DEVELOP NBSP;THE NBSP;ECONOMIC NBSP;TECHNOLOGY NBSP;COMMUNITY NBSP;IN NBSP;CHICAGO NBSP;THROUGH NBSP;VERY NBSP;LOW NBSP;TO NBSP;NO NBSP;COST NBSP;ACCESS NBSP;TO NBSP;OFFICE NBSP;SPACE NBSP;COLLBORATIVE NBSP;WORKSPACES NBSP;AND NBSP;PROFESSIONALS NBSP;TO NBSP;PROMOTE NBSP;AND NBSP;SUPPORT NBSP;INNOVATION NBSP;IN NBSP;THE NBSP;CITY NBSP;OF NBSP;CHICAGO |
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| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | FINANCIAL SUPPORT FROM CORPORATE PARTNERS TO HELP SUBSIDIZE OFFICE SPACE. |
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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE BOARD RETAINS THE SERVICES OF AN INDEPENDENT FIRM TO PREPARE/REVIEW THE ORGANIZATIONS FORM 990. MANAGEMENT REVIEWS THE COMPLETED FORM AND PROVIDES A COPY TO ALL VOTING MEMBERS OF THE GOVERNING BODY PRIOR TO FILING. A REASONABLE AMOUNT OF TIME IS PROVIDED TO REVIEW THE RETURN AND ASK ANY QUESTIONS OF MANAGEMENT OR THE INDEPENDENT FIRM PRIOR TO FILING. A MEETING OR CONFERENCE MAY BE ARRANGED BETWEEN FIRM AND ORGANIZATION MANAGEMENT TO DISCUSS THE FORM 990 WITH THE GOVERNING BODY OR THEIR DESIGNATED COMMITTEE. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE AVAILABLE THROUGH THE APPLICABLE GOVERMENTAL AGENCIES. THE CONFLICT OF INTERET POLICY IS AVAILABLE UPON WRITTEN REQUEST TO THE ORGANIZATION. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART VI, SECTION B, LINE 11 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART VI, SECTION C, LINE 19 |
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| IRS990/UponRequestInd | 0 | X |
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| IRS990/USAddress/CityNm | 0 | CHICAGO |
| IRS990/USAddress/StateAbbreviationCd | 0 | IL |
| IRS990/USAddress/ZIPCd | 0 | 60654 |
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| IRS990/VotingMembersIndependentCnt | 0 | 5 |
| IRS990/WebsiteAddressTxt | 0 | WWW.CATAPULTCHICAGO.COM |
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| ReturnHeader/BuildTS | 0 | 2019-02-21 02:37:17Z |
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| ReturnHeader/Filer/USAddress/CityNm | 0 | CHICAGO |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | IL |
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| ReturnHeader/FilingSecurityInformation/FilingLicenseTypeCd | 0 | P |
| ReturnHeader/FilingSecurityInformation/IPAddress/IPv4AddressTxt | 0 | 72.194.25.95 |
| ReturnHeader/FilingSecurityInformation/IPDt | 0 | 2019-05-02 |
| ReturnHeader/FilingSecurityInformation/IPTm | 0 | 14:31:00 |
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| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | J ERNESTEA |
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| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | JOSEPH E NAGY |
| ReturnHeader/PreparerPersonGrp/SelfEmployedInd | 0 | X |
| ReturnHeader/ReturnTs | 0 | 2019-05-10T18:00:12-05:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2018-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2018-12-31 |
| ReturnHeader/TaxYr | 0 | 2018 |