| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 312061 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 284996 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 257655 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 139598 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | CHADD PROVIDES SUPPORT FOR INDIVIDUALS WITH ATTENTION DEFICIT/HYPERACTIVITY DISORDERS. |
| IRS990/AddressChangeInd | 0 | X |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 29 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 27164 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 27193 |
| IRS990/AllOtherContributionsAmt | 0 | 468970 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 14 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 1817 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 11141 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 12972 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1 | 0 | THE ORGANIZATION |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 3013067070 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1 | 0 | 4601 PRESIDENTS DRIVE SUITE 300 |
| IRS990/BooksInCareOfDetail/USAddress/City | 0 | LANHAM |
| IRS990/BooksInCareOfDetail/USAddress/State | 0 | MD |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCode | 0 | 20706 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 47839 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 47196 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 2623 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 5820 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 35485 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 43928 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/FundraisingAmt | 0 | 2719 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 10014 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 254505 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 267238 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 167813 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 155317 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1 | 0 | 8181 PROFESSIONAL PLACE SUITE 206 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1 | 1 | 8229 BOONE BLVD SUITE 300 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/City | 0 | LANDOVER |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/City | 1 | VIENNA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/State | 0 | MD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/State | 1 | VA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCode | 0 | 20785 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCode | 1 | 22182 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1 | 0 | BRIGHTLEAF PROPERTIES LLC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1 | 1 | PROSOURCING PARTNERS LLC DBA CORDIA PART |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | RENTAL |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | ACCOUNTING SERVICES |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 1275305 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 10000 |
| IRS990/CYInvestmentIncomeAmt | 0 | 50148 |
| IRS990/CYOtherExpensesAmt | 0 | 1591991 |
| IRS990/CYOtherRevenueAmt | 0 | 15166 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 1147646 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -814767 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 1701041 |
| IRS990/CYTotalExpensesAmt | 0 | 3303032 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 155569 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 2488265 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 151605 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 104707 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 25481 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 101529 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 127010 |
| IRS990/Desc | 0 | PUBLIC EDUCATION AND OUTREACH - CHADD PROVIDES A BROAD RANGE OF INFORMATION ON THE DIAGNOSIS, TREATMENT AND MANAGEMENT OF ADHD IN BOTH ADULTS AND CHILDREN. OUR GOAL IS TO PROVIDE USABLE INFORMATION FOR THE GENERAL PUBLIC WHICH IS BASED ON THE LATEST SCIENTIFIC RESEARCH AND STATE OF THE ART TREATMENT GUIDELINES. WE PROVIDE THIS INFORMATION THROUGH MANY MEDIUMS INCLUDING PRINT MEDIA, LOCAL PRESENTATIONS, CHADD'S WEBSITE, TRAININGS, CONFERENCES AND PRESS MEDIA. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 26 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 1954038 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditPerformedInd | 0 | 1 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 1 |
| IRS990/FederatedCampaignsAmt | 0 | 62980 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 135652 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 22200 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 157852 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 47720 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 47720 |
| IRS990/FeesForServicesLobbyingGrp/ProgramServicesAmt | 0 | 48049 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 48049 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 1856 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 60763 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 146720 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 209339 |
| 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 | 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 | 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/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 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 8564 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | MICHAEL MACKAY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | BARBARA S HAWKINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | M JEFFRY SPAHR JD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | PATRICIA MICHEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | INGRID ALPERN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JOHN GOODMAN MD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | ZANDRA L MAFFETT MS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | EVA O'MALLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | HARVEY PARKER PHD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | MIKE SKOIEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | ELAINE TAYLOR-KLAUS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | DULCE TORRES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | ARI TUCKMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | JOHN WILLSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | RUTH HUGHES |
| 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 | 140456 |
| 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/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | IMMEDIATE PAST-PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | CHIEF EXECUTIVE OFFICER (JULY THROUGH JANUARY) |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1987 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 44040 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 14 |
| IRS990/GovernmentGrantsAmt | 0 | 743355 |
| IRS990/GrantAmt | 0 | 10000 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 10000 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 10000 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 493195 |
| IRS990/GrossReceiptsAmt | 0 | 2937420 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 14 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 24011 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 15186 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 39197 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 676 |
| IRS990/InterestGrp/TotalAmt | 0 | 676 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 1668 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 1668 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 6108 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 6108 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 533680 |
| IRS990/IRPDocumentCnt | 0 | 20 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 312654 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 312548 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 221953 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 534607 |
| IRS990/LegalDomicileStateCd | 0 | MD |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 449155 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 1 |
| IRS990/LocalChaptersInd | 0 | 1 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MiscellaneousRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 1266 |
| IRS990/MiscellaneousRevenueGrp/TotalRevenueColumnAmt | 0 | 1266 |
| IRS990/MissionDesc | 0 | CHADD PROVIDES SUPPORT FOR INDIVIDUALS WITH ATTENTION DEFICIT/HYPERACTIVITY DISORDERS THROUGH PARENT SUPPORT GROUPS, LOCAL CHAPTERS, CONFERENCES, MAGAZINE PUBLICATIONS, NEWSLETTERS & PROGRAM MATERIAL, AND WORKING WITH SCHOOL SYSTEMS AT THE STATE AND LOCAL LEVEL. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 902335 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 77936 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 44040 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 44040 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | -139744 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -9632 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 7880 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 23367 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 105306 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 136553 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 16163 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 35153 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 233085 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 284401 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 14565 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 10508 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 1398 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 35142 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 149103 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 185643 |
| IRS990/OtherExpensesGrp/Desc | 0 | REPAIRS AND MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 1 | LICENSES AND CREDIT CAR |
| IRS990/OtherExpensesGrp/Desc | 2 | BAD DEBT EXPENSE |
| IRS990/OtherExpensesGrp/Desc | 3 | DUES AND SUBSCRIPTIONS |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 1135 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 1373 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 356 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 15723 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 7455 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 37335 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 3 | 3842 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 72609 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 46784 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 18817 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 89467 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 55612 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 37335 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 23015 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 80000 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 1 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 2 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | MISCELLANEOUS INCOME |
| IRS990/OtherRevenueMiscGrp/Desc | 1 | CHAPTER CLOSED ACCOUNT |
| IRS990/OtherRevenueMiscGrp/Desc | 2 | CAR DONATION |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 8241 |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 1 | 3337 |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 2 | 2322 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 8241 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 1 | 3337 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 2 | 2322 |
| IRS990/OtherRevenueTotalAmt | 0 | 15166 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 112577 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 119411 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 1139122 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 1371110 |
| IRS990/OtherWebsiteInd | 0 | X |
| IRS990/OwnWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 6582 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 9203 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 84575 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 100360 |
| IRS990/PoliciesReferenceChaptersInd | 0 | 1 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 89497 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 37423 |
| IRS990/PrincipalOfficerNm | 0 | APRIL GOWER-GETZ |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | CONFERENCES |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | MEMBERSHIP DUES |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | PUBLICATIONS |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 521275 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 460148 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 29166 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 521275 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 460148 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 166223 |
| IRS990/ProgramServiceRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 137057 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | MEMBERSHIP AND CHAPTER SERVICES - IN ADDITION TO GOOD INFORMATION, ANYONE DEALING WITH A DIAGNOSIS OF ADHD IN THE COMMUNITY NEEDS SUPPORT FROM OTHERS WHO SHARE THE SAME CONCERNS. CHADD'S MEMBERSHIP AND CHAPTERS PROVIDE A COMMUNITY OF PEOPLE WHO SHARE THESE CONCERNS AND ARE AVAILABLE TO SUPPORT ONE ANOTHER. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 535555 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 224657 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | PUBLIC ADVOCACY - CHADD'S PUBLIC ADVOCACY EFFORTS ENSURES THAT THE VOICE OF THOSE AFFECTED BY ADHD ARE HEARD BY POLICY MAKERS IN HEALTH CARE AND EDUCATION. WE PROVIDE INFORMATION ON THE DISORDER AND INFORMATION ON THE WAYS POLICY AFFECTS ACCESS TO TREATMENT AND SUPPORT FOR ADHD. |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 48483 |
| IRS990/ProgSrvcAccomActy3Grp/RevenueAmt | 0 | 21396 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 1664558 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 37138 |
| IRS990/PYInvestmentIncomeAmt | 0 | 29824 |
| IRS990/PYOtherExpensesAmt | 0 | 1662882 |
| IRS990/PYOtherRevenueAmt | 0 | 29399 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 1472591 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -241775 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 1738127 |
| IRS990/PYTotalExpensesAmt | 0 | 3438147 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 3196372 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -814767 |
| 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 |