{"cik":1613780,"accession":"0001628280-26-048453","metadata":{"formType":"Form 10-Q","formDescription":"Quarterly report [Sections 13 or 15(d)]","accession":"0001628280-26-048453","filingDate":"2026-07-16","accepted":"2026-07-16 16:08:51","periodOfReport":"2026-06-30","documentCount":96},"urls":{"index":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/0001628280-26-048453-index.htm","archive":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453","viewer":"https://www.sec.gov/cgi-bin/viewer?action=view&cik=1613780&accession_number=0001628280-26-048453&xbrl_type=f","homepage":"https://www.sec.gov/Archives/edgar/data/1613780/0001628280-26-048453-index.html","text":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/0001628280-26-048453.txt","headers":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/0001628280-26-048453-index-headers.html"},"primaryDocument":{"seq":1,"description":"10-Q","filename":"dbvt-20260630.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/dbvt-20260630.htm","type":"10-Q","size":1089446,"isXBRL":true},"documents":[{"seq":1,"description":"10-Q","filename":"dbvt-20260630.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/dbvt-20260630.htm","type":"10-Q","size":1089446,"isXBRL":true},{"seq":2,"description":"EX-31.1","filename":"exhibit311-dbv_10xqxq2x2026.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/exhibit311-dbv_10xqxq2x2026.htm","type":"EX-31","size":10578,"isXBRL":false},{"seq":3,"description":"EX-31.2","filename":"exhibit312-dbv_10xqxq2x2026.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/exhibit312-dbv_10xqxq2x2026.htm","type":"EX-31","size":10505,"isXBRL":false},{"seq":4,"description":"EX-32.1","filename":"exhibit321-dbv_10xqxq2x2026.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/exhibit321-dbv_10xqxq2x2026.htm","type":"EX-32","size":6859,"isXBRL":false}],"dataFiles":[{"seq":100,"description":"EXTRACTED XBRL INSTANCE DOCUMENT","filename":"dbvt-20260630_htm.xml","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/dbvt-20260630_htm.xml","type":"XML","size":997142,"isXBRL":false}],"xbrl":{"available":true,"statements":[{"htmlFileName":"R2.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R2.htm","longName":"9952151 - Statement - Condensed Consolidated Statements of Financial Position (unaudited)","shortName":"Condensed Consolidated Statements of Financial Position (unaudited)","reportType":"Sheet","menuCategory":"Statements","position":2,"role":"http://www.dbv-technologies.com/role/CondensedConsolidatedStatementsofFinancialPositionunaudited","instance":"dbvt-20260630.htm"},{"htmlFileName":"R3.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R3.htm","longName":"9952152 - Statement - Condensed Consolidated Statements of Financial Position (unaudited) (Parenthetical)","shortName":"Condensed Consolidated Statements of Financial Position (unaudited) (Parenthetical)","reportType":"Sheet","menuCategory":"Statements","position":3,"role":"http://www.dbv-technologies.com/role/CondensedConsolidatedStatementsofFinancialPositionunauditedParenthetical","instance":"dbvt-20260630.htm"},{"htmlFileName":"R4.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R4.htm","longName":"9952153 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited)","shortName":"Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited)","reportType":"Sheet","menuCategory":"Statements","position":4,"role":"http://www.dbv-technologies.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveLossunaudited","instance":"dbvt-20260630.htm"},{"htmlFileName":"R5.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R5.htm","longName":"9952154 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited)","shortName":"Condensed Consolidated Statements of Cash Flows (unaudited)","reportType":"Sheet","menuCategory":"Statements","position":5,"role":"http://www.dbv-technologies.com/role/CondensedConsolidatedStatementsofCashFlowsunaudited","instance":"dbvt-20260630.htm"},{"htmlFileName":"R6.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R6.htm","longName":"9952155 - Statement - Condensed Consolidated Statements of Changes in Shareholders' Equity (unaudited)","shortName":"Condensed Consolidated Statements of Changes in Shareholders' Equity (unaudited)","reportType":"Sheet","menuCategory":"Statements","position":6,"role":"http://www.dbv-technologies.com/role/CondensedConsolidatedStatementsofChangesinShareholdersEquityunaudited","instance":"dbvt-20260630.htm"}],"notes":[{"htmlFileName":"R7.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R7.htm","longName":"9952156 - Disclosure - Nature of the business and principles and accounting methods","shortName":"Nature of the business and principles and accounting methods","reportType":"Sheet","menuCategory":"Notes","position":7,"role":"http://www.dbv-technologies.com/role/Natureofthebusinessandprinciplesandaccountingmethods","instance":"dbvt-20260630.htm"},{"htmlFileName":"R8.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R8.htm","longName":"9952157 - Disclosure - Significant Events and Transactions","shortName":"Significant Events and Transactions","reportType":"Sheet","menuCategory":"Notes","position":8,"role":"http://www.dbv-technologies.com/role/SignificantEventsandTransactions","instance":"dbvt-20260630.htm"},{"htmlFileName":"R9.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R9.htm","longName":"9952158 - Disclosure - Cash and Cash Equivalents","shortName":"Cash and Cash Equivalents","reportType":"Sheet","menuCategory":"Notes","position":9,"role":"http://www.dbv-technologies.com/role/CashandCashEquivalents","instance":"dbvt-20260630.htm"},{"htmlFileName":"R10.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R10.htm","longName":"9952159 - Disclosure - Property, Plant & Equipment","shortName":"Property, Plant & Equipment","reportType":"Sheet","menuCategory":"Notes","position":10,"role":"http://www.dbv-technologies.com/role/PropertyPlantEquipment","instance":"dbvt-20260630.htm"},{"htmlFileName":"R11.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R11.htm","longName":"9952160 - Disclosure - Other Current & Non Current Assets","shortName":"Other Current & Non Current Assets","reportType":"Sheet","menuCategory":"Notes","position":11,"role":"http://www.dbv-technologies.com/role/OtherCurrentNonCurrentAssets","instance":"dbvt-20260630.htm"},{"htmlFileName":"R12.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R12.htm","longName":"9952161 - Disclosure - Lease contracts","shortName":"Lease contracts","reportType":"Sheet","menuCategory":"Notes","position":12,"role":"http://www.dbv-technologies.com/role/Leasecontracts","instance":"dbvt-20260630.htm"},{"htmlFileName":"R13.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R13.htm","longName":"9952162 - Disclosure - Trade Payables and Other Current Liabilities","shortName":"Trade Payables and Other Current Liabilities","reportType":"Sheet","menuCategory":"Notes","position":13,"role":"http://www.dbv-technologies.com/role/TradePayablesandOtherCurrentLiabilities","instance":"dbvt-20260630.htm"},{"htmlFileName":"R14.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R14.htm","longName":"9952163 - Disclosure - Shareholders' equity","shortName":"Shareholders' equity","reportType":"Sheet","menuCategory":"Notes","position":14,"role":"http://www.dbv-technologies.com/role/Shareholdersequity","instance":"dbvt-20260630.htm"},{"htmlFileName":"R15.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R15.htm","longName":"9952164 - Disclosure - Fair Value Measurement","shortName":"Fair Value Measurement","reportType":"Sheet","menuCategory":"Notes","position":15,"role":"http://www.dbv-technologies.com/role/FairValueMeasurement","instance":"dbvt-20260630.htm"},{"htmlFileName":"R16.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R16.htm","longName":"9952165 - Disclosure - Share-Based Payments","shortName":"Share-Based Payments","reportType":"Sheet","menuCategory":"Notes","position":16,"role":"http://www.dbv-technologies.com/role/ShareBasedPayments","instance":"dbvt-20260630.htm"},{"htmlFileName":"R17.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R17.htm","longName":"9952166 - Disclosure - Contingencies & Employee Benefits","shortName":"Contingencies & Employee Benefits","reportType":"Sheet","menuCategory":"Notes","position":17,"role":"http://www.dbv-technologies.com/role/ContingenciesEmployeeBenefits","instance":"dbvt-20260630.htm"},{"htmlFileName":"R18.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R18.htm","longName":"9952167 - Disclosure - Operating income","shortName":"Operating income","reportType":"Sheet","menuCategory":"Notes","position":18,"role":"http://www.dbv-technologies.com/role/Operatingincome","instance":"dbvt-20260630.htm"},{"htmlFileName":"R19.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R19.htm","longName":"9952168 - Disclosure - Allocation of Personnel Expenses","shortName":"Allocation of Personnel Expenses","reportType":"Sheet","menuCategory":"Notes","position":19,"role":"http://www.dbv-technologies.com/role/AllocationofPersonnelExpenses","instance":"dbvt-20260630.htm"},{"htmlFileName":"R20.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R20.htm","longName":"9952169 - Disclosure - Commitments","shortName":"Commitments","reportType":"Sheet","menuCategory":"Notes","position":20,"role":"http://www.dbv-technologies.com/role/Commitments","instance":"dbvt-20260630.htm"},{"htmlFileName":"R21.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R21.htm","longName":"9952170 - Disclosure - Relationships with Related Parties","shortName":"Relationships with Related Parties","reportType":"Sheet","menuCategory":"Notes","position":21,"role":"http://www.dbv-technologies.com/role/RelationshipswithRelatedParties","instance":"dbvt-20260630.htm"},{"htmlFileName":"R22.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R22.htm","longName":"9952171 - Disclosure - Loss Per Share","shortName":"Loss Per Share","reportType":"Sheet","menuCategory":"Notes","position":22,"role":"http://www.dbv-technologies.com/role/LossPerShare","instance":"dbvt-20260630.htm"},{"htmlFileName":"R23.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R23.htm","longName":"9952172 - Disclosure - Reportable segment disclosure","shortName":"Reportable segment disclosure","reportType":"Sheet","menuCategory":"Notes","position":23,"role":"http://www.dbv-technologies.com/role/Reportablesegmentdisclosure","instance":"dbvt-20260630.htm"},{"htmlFileName":"R24.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R24.htm","longName":"9952173 - Disclosure - Events after the Close of the Period","shortName":"Events after the Close of the Period","reportType":"Sheet","menuCategory":"Notes","position":24,"role":"http://www.dbv-technologies.com/role/EventsaftertheCloseofthePeriod","instance":"dbvt-20260630.htm"},{"htmlFileName":"R25.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R25.htm","longName":"995445 - Disclosure - Insider Trading Arrangements","shortName":"Insider Trading Arrangements","reportType":"Sheet","menuCategory":"Notes","position":25,"role":"http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements","instance":"dbvt-20260630.htm"}],"tables":[{"htmlFileName":"R27.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R27.htm","longName":"9955512 - Disclosure - Cash and Cash Equivalents (Tables)","shortName":"Cash and Cash Equivalents (Tables)","reportType":"Sheet","menuCategory":"Tables","position":27,"role":"http://www.dbv-technologies.com/role/CashandCashEquivalentsTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R28.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R28.htm","longName":"9955513 - Disclosure - Property, Plant & Equipment (Tables)","shortName":"Property, Plant & Equipment (Tables)","reportType":"Sheet","menuCategory":"Tables","position":28,"role":"http://www.dbv-technologies.com/role/PropertyPlantEquipmentTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R29.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R29.htm","longName":"9955514 - Disclosure - Other Current & Non Current Assets (Tables)","shortName":"Other Current & Non Current Assets (Tables)","reportType":"Sheet","menuCategory":"Tables","position":29,"role":"http://www.dbv-technologies.com/role/OtherCurrentNonCurrentAssetsTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R30.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R30.htm","longName":"9955515 - Disclosure - Lease contracts (Tables)","shortName":"Lease contracts (Tables)","reportType":"Sheet","menuCategory":"Tables","position":30,"role":"http://www.dbv-technologies.com/role/LeasecontractsTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R31.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R31.htm","longName":"9955516 - Disclosure - Trade Payables and Other Current Liabilities (Tables)","shortName":"Trade Payables and Other Current Liabilities (Tables)","reportType":"Sheet","menuCategory":"Tables","position":31,"role":"http://www.dbv-technologies.com/role/TradePayablesandOtherCurrentLiabilitiesTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R32.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R32.htm","longName":"9955517 - Disclosure - Shareholders’ equity (Tables)","shortName":"Shareholders’ equity (Tables)","reportType":"Sheet","menuCategory":"Tables","position":32,"role":"http://www.dbv-technologies.com/role/ShareholdersequityTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R33.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R33.htm","longName":"9955518 - Disclosure - Fair Value Measurement (Tables)","shortName":"Fair Value Measurement (Tables)","reportType":"Sheet","menuCategory":"Tables","position":33,"role":"http://www.dbv-technologies.com/role/FairValueMeasurementTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R34.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R34.htm","longName":"9955519 - Disclosure - Share-Based Payments (Tables)","shortName":"Share-Based Payments (Tables)","reportType":"Sheet","menuCategory":"Tables","position":34,"role":"http://www.dbv-technologies.com/role/ShareBasedPaymentsTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R35.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R35.htm","longName":"9955520 - Disclosure - Contingencies & Employee Benefits (Tables)","shortName":"Contingencies & Employee Benefits (Tables)","reportType":"Sheet","menuCategory":"Tables","position":35,"role":"http://www.dbv-technologies.com/role/ContingenciesEmployeeBenefitsTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R36.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R36.htm","longName":"9955521 - Disclosure - Operating income (Tables)","shortName":"Operating income (Tables)","reportType":"Sheet","menuCategory":"Tables","position":36,"role":"http://www.dbv-technologies.com/role/OperatingincomeTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R37.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R37.htm","longName":"9955522 - Disclosure - Allocation of Personnel Expenses (Tables)","shortName":"Allocation of Personnel Expenses (Tables)","reportType":"Sheet","menuCategory":"Tables","position":37,"role":"http://www.dbv-technologies.com/role/AllocationofPersonnelExpensesTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R38.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R38.htm","longName":"9955523 - Disclosure - Commitments (Tables)","shortName":"Commitments (Tables)","reportType":"Sheet","menuCategory":"Tables","position":38,"role":"http://www.dbv-technologies.com/role/CommitmentsTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R39.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R39.htm","longName":"9955524 - Disclosure - Relationships with Related Parties (Tables)","shortName":"Relationships with Related Parties (Tables)","reportType":"Sheet","menuCategory":"Tables","position":39,"role":"http://www.dbv-technologies.com/role/RelationshipswithRelatedPartiesTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R40.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R40.htm","longName":"9955525 - Disclosure - Loss Per Share (Tables)","shortName":"Loss Per Share (Tables)","reportType":"Sheet","menuCategory":"Tables","position":40,"role":"http://www.dbv-technologies.com/role/LossPerShareTables","instance":"dbvt-20260630.htm"},{"htmlFileName":"R41.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R41.htm","longName":"9955526 - Disclosure - Reportable segment disclosure (Tables)","shortName":"Reportable segment disclosure (Tables)","reportType":"Sheet","menuCategory":"Tables","position":41,"role":"http://www.dbv-technologies.com/role/ReportablesegmentdisclosureTables","instance":"dbvt-20260630.htm"}],"details":[{"htmlFileName":"R42.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R42.htm","longName":"9955527 - Disclosure - Nature of the business and principles and accounting methods (Details)","shortName":"Nature of the business and principles and accounting methods (Details)","reportType":"Sheet","menuCategory":"Details","position":42,"role":"http://www.dbv-technologies.com/role/NatureofthebusinessandprinciplesandaccountingmethodsDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R43.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R43.htm","longName":"9955528 - Disclosure - Significant Events and Transactions (Details)","shortName":"Significant Events and Transactions (Details)","reportType":"Sheet","menuCategory":"Details","position":43,"role":"http://www.dbv-technologies.com/role/SignificantEventsandTransactionsDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R44.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R44.htm","longName":"9955529 - Disclosure - Cash and Cash Equivalents - Summary of breakdown of cash and cash equivalents (Details)","shortName":"Cash and Cash Equivalents - Summary of breakdown of cash and cash equivalents (Details)","reportType":"Sheet","menuCategory":"Details","position":44,"role":"http://www.dbv-technologies.com/role/CashandCashEquivalentsSummaryofbreakdownofcashandcashequivalentsDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R45.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R45.htm","longName":"9955530 - Disclosure - Cash and Cash Equivalents - Additional Information (Details)","shortName":"Cash and Cash Equivalents - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":45,"role":"http://www.dbv-technologies.com/role/CashandCashEquivalentsAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R46.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R46.htm","longName":"9955531 - Disclosure - Property, Plant & Equipment - Summary of Property, Plant & Equipment (Details)","shortName":"Property, Plant & Equipment - Summary of Property, Plant & Equipment (Details)","reportType":"Sheet","menuCategory":"Details","position":46,"role":"http://www.dbv-technologies.com/role/PropertyPlantEquipmentSummaryofPropertyPlantEquipmentDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R47.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R47.htm","longName":"9955532 - Disclosure - Property, Plant & Equipment - Additional Information (Details)","shortName":"Property, Plant & Equipment - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":47,"role":"http://www.dbv-technologies.com/role/PropertyPlantEquipmentAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R48.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R48.htm","longName":"9955533 - Disclosure - Other Current & Non Current Assets - Summary of Other Current Asset (Details)","shortName":"Other Current & Non Current Assets - Summary of Other Current Asset (Details)","reportType":"Sheet","menuCategory":"Details","position":48,"role":"http://www.dbv-technologies.com/role/OtherCurrentNonCurrentAssetsSummaryofOtherCurrentAssetDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R49.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R49.htm","longName":"9955534 - Disclosure - Other Current & Non Current Assets - Additional Information (Details)","shortName":"Other Current & Non Current Assets - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":49,"role":"http://www.dbv-technologies.com/role/OtherCurrentNonCurrentAssetsAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R50.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R50.htm","longName":"9955535 - Disclosure - Other Current & Non Current Assets - Summary of Research Tax Credit (Details)","shortName":"Other Current & Non Current Assets - Summary of Research Tax Credit (Details)","reportType":"Sheet","menuCategory":"Details","position":50,"role":"http://www.dbv-technologies.com/role/OtherCurrentNonCurrentAssetsSummaryofResearchTaxCreditDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R51.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R51.htm","longName":"9955536 - Disclosure - Lease contracts - Summary of Right of use Assets (Details)","shortName":"Lease contracts - Summary of Right of use Assets (Details)","reportType":"Sheet","menuCategory":"Details","position":51,"role":"http://www.dbv-technologies.com/role/LeasecontractsSummaryofRightofuseAssetsDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R52.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R52.htm","longName":"9955537 - Disclosure - Lease contracts - Summary of Operating Leases Future Minimum Payments (Details)","shortName":"Lease contracts - Summary of Operating Leases Future Minimum Payments (Details)","reportType":"Sheet","menuCategory":"Details","position":52,"role":"http://www.dbv-technologies.com/role/LeasecontractsSummaryofOperatingLeasesFutureMinimumPaymentsDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R53.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R53.htm","longName":"9955538 - Disclosure - Lease contracts - Additional Information (Details)","shortName":"Lease contracts - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":53,"role":"http://www.dbv-technologies.com/role/LeasecontractsAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R54.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R54.htm","longName":"9955539 - Disclosure - Lease contracts - Summary of Rent Expenses (Details)","shortName":"Lease contracts - Summary of Rent Expenses (Details)","reportType":"Sheet","menuCategory":"Details","position":54,"role":"http://www.dbv-technologies.com/role/LeasecontractsSummaryofRentExpensesDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R55.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R55.htm","longName":"9955540 - Disclosure - Trade Payables and Other Current Liabilities - Schedule of Trade Payables (Details)","shortName":"Trade Payables and Other Current Liabilities - Schedule of Trade Payables (Details)","reportType":"Sheet","menuCategory":"Details","position":55,"role":"http://www.dbv-technologies.com/role/TradePayablesandOtherCurrentLiabilitiesScheduleofTradePayablesDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R56.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R56.htm","longName":"9955541 - Disclosure - Trade Payables and Other Current Liabilities - Additional Information (Details)","shortName":"Trade Payables and Other Current Liabilities - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":56,"role":"http://www.dbv-technologies.com/role/TradePayablesandOtherCurrentLiabilitiesAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R57.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R57.htm","longName":"9955542 - Disclosure - Trade Payables and Other Current Liabilities - Summary of Other Current Liabilities (Details)","shortName":"Trade Payables and Other Current Liabilities - Summary of Other Current Liabilities (Details)","reportType":"Sheet","menuCategory":"Details","position":57,"role":"http://www.dbv-technologies.com/role/TradePayablesandOtherCurrentLiabilitiesSummaryofOtherCurrentLiabilitiesDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R58.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R58.htm","longName":"9955543 - Disclosure - Shareholders' equity - Additional Information (Details)","shortName":"Shareholders' equity - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":58,"role":"http://www.dbv-technologies.com/role/ShareholdersequityAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R59.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R59.htm","longName":"9955544 - Disclosure - Shareholders' equity - Schedule of stockholder's equity (Details)","shortName":"Shareholders' equity - Schedule of stockholder's equity (Details)","reportType":"Sheet","menuCategory":"Details","position":59,"role":"http://www.dbv-technologies.com/role/ShareholdersequityScheduleofstockholdersequityDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R60.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R60.htm","longName":"9955545 - Disclosure - Fair Value Measurement - Schedule of foreign exchange derivatives (Details)","shortName":"Fair Value Measurement - Schedule of foreign exchange derivatives (Details)","reportType":"Sheet","menuCategory":"Details","position":60,"role":"http://www.dbv-technologies.com/role/FairValueMeasurementScheduleofforeignexchangederivativesDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R61.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R61.htm","longName":"9955546 - Disclosure - Fair Value Measurement - Additional Information (Details)","shortName":"Fair Value Measurement - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":61,"role":"http://www.dbv-technologies.com/role/FairValueMeasurementAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R62.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R62.htm","longName":"9955547 - Disclosure - Share-Based Payments - Additional Information (Details)","shortName":"Share-Based Payments - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":62,"role":"http://www.dbv-technologies.com/role/ShareBasedPaymentsAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R63.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R63.htm","longName":"9955548 - Disclosure - Share-Based Payments - Summary of BSA/SO/RSU activity (Details)","shortName":"Share-Based Payments - Summary of BSA/SO/RSU activity (Details)","reportType":"Sheet","menuCategory":"Details","position":63,"role":"http://www.dbv-technologies.com/role/ShareBasedPaymentsSummaryofBSASORSUactivityDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R64.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R64.htm","longName":"9955549 - Disclosure - Share-Based Payments - Summary of Share-Based Payments Expenses (Details)","shortName":"Share-Based Payments - Summary of Share-Based Payments Expenses (Details)","reportType":"Sheet","menuCategory":"Details","position":64,"role":"http://www.dbv-technologies.com/role/ShareBasedPaymentsSummaryofShareBasedPaymentsExpensesDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R65.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R65.htm","longName":"9955550 - Disclosure - Contingencies & Employee Benefits - Summary of Non Current Contingencies and Current Contingencies (Details)","shortName":"Contingencies & Employee Benefits - Summary of Non Current Contingencies and Current Contingencies (Details)","reportType":"Sheet","menuCategory":"Details","position":65,"role":"http://www.dbv-technologies.com/role/ContingenciesEmployeeBenefitsSummaryofNonCurrentContingenciesandCurrentContingenciesDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R66.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R66.htm","longName":"9955551 - Disclosure - Contingencies & Employee Benefits - Summary of Movement in Contingencies (Details)","shortName":"Contingencies & Employee Benefits - Summary of Movement in Contingencies (Details)","reportType":"Sheet","menuCategory":"Details","position":66,"role":"http://www.dbv-technologies.com/role/ContingenciesEmployeeBenefitsSummaryofMovementinContingenciesDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R67.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R67.htm","longName":"9955552 - Disclosure - Operating income - Schedule of operating income (Details)","shortName":"Operating income - Schedule of operating income (Details)","reportType":"Sheet","menuCategory":"Details","position":67,"role":"http://www.dbv-technologies.com/role/OperatingincomeScheduleofoperatingincomeDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R68.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R68.htm","longName":"9955553 - Disclosure - Operating income - Additional Information (Details)","shortName":"Operating income - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":68,"role":"http://www.dbv-technologies.com/role/OperatingincomeAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R69.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R69.htm","longName":"9955554 - Disclosure - Allocation of Personnel Expenses - Additional Information (Details)","shortName":"Allocation of Personnel Expenses - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":69,"role":"http://www.dbv-technologies.com/role/AllocationofPersonnelExpensesAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R70.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R70.htm","longName":"9955555 - Disclosure - Allocation of Personnel Expenses - Summary of Allocation of Personnel Expenses By Function (Details)","shortName":"Allocation of Personnel Expenses - Summary of Allocation of Personnel Expenses By Function (Details)","reportType":"Sheet","menuCategory":"Details","position":70,"role":"http://www.dbv-technologies.com/role/AllocationofPersonnelExpensesSummaryofAllocationofPersonnelExpensesByFunctionDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R71.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R71.htm","longName":"9955556 - Disclosure - Allocation of Personnel Expenses - Summary of Allocation of Personnel Expenses By Nature (Details)","shortName":"Allocation of Personnel Expenses - Summary of Allocation of Personnel Expenses By Nature (Details)","reportType":"Sheet","menuCategory":"Details","position":71,"role":"http://www.dbv-technologies.com/role/AllocationofPersonnelExpensesSummaryofAllocationofPersonnelExpensesByNatureDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R72.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R72.htm","longName":"9955557 - Disclosure - Commitments - Schedule of Purchase Obligations (Details)","shortName":"Commitments - Schedule of Purchase Obligations (Details)","reportType":"Sheet","menuCategory":"Details","position":72,"role":"http://www.dbv-technologies.com/role/CommitmentsScheduleofPurchaseObligationsDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R73.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R73.htm","longName":"9955558 - Disclosure - Commitments - Additional Information (Details)","shortName":"Commitments - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":73,"role":"http://www.dbv-technologies.com/role/CommitmentsAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R74.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R74.htm","longName":"9955559 - Disclosure - Relationships with Related Parties - Additional Information (Details)","shortName":"Relationships with Related Parties - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":74,"role":"http://www.dbv-technologies.com/role/RelationshipswithRelatedPartiesAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R75.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R75.htm","longName":"9955560 - Disclosure - Relationships with Related Parties - Schedule of relationship with related parties (Details)","shortName":"Relationships with Related Parties - Schedule of relationship with related parties (Details)","reportType":"Sheet","menuCategory":"Details","position":75,"role":"http://www.dbv-technologies.com/role/RelationshipswithRelatedPartiesScheduleofrelationshipwithrelatedpartiesDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R76.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R76.htm","longName":"9955561 - Disclosure - Relationships with Related Parties - Schedule of related party transactions (Details)","shortName":"Relationships with Related Parties - Schedule of related party transactions (Details)","reportType":"Sheet","menuCategory":"Details","position":76,"role":"http://www.dbv-technologies.com/role/RelationshipswithRelatedPartiesScheduleofrelatedpartytransactionsDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R77.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R77.htm","longName":"9955562 - Disclosure - Loss Per Share - Schedule of earnings per share, basic and diluted (Details)","shortName":"Loss Per Share - Schedule of earnings per share, basic and diluted (Details)","reportType":"Sheet","menuCategory":"Details","position":77,"role":"http://www.dbv-technologies.com/role/LossPerShareScheduleofearningspersharebasicanddilutedDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R78.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R78.htm","longName":"9955563 - Disclosure - Loss Per Share - Schedule of antidilutive securities excluded from computation of earnings per share (Details)","shortName":"Loss Per Share - Schedule of antidilutive securities excluded from computation of earnings per share (Details)","reportType":"Sheet","menuCategory":"Details","position":78,"role":"http://www.dbv-technologies.com/role/LossPerShareScheduleofantidilutivesecuritiesexcludedfromcomputationofearningspershareDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R79.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R79.htm","longName":"9955564 - Disclosure - Reportable segment disclosure - Schedule of Segment Reporting Information, by Segment (Details)","shortName":"Reportable segment disclosure - Schedule of Segment Reporting Information, by Segment (Details)","reportType":"Sheet","menuCategory":"Details","position":79,"role":"http://www.dbv-technologies.com/role/ReportablesegmentdisclosureScheduleofSegmentReportingInformationbySegmentDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R80.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R80.htm","longName":"9955565 - Disclosure - Reportable segment disclosure - Additional Information (Details)","shortName":"Reportable segment disclosure - Additional Information (Details)","reportType":"Sheet","menuCategory":"Details","position":80,"role":"http://www.dbv-technologies.com/role/ReportablesegmentdisclosureAdditionalInformationDetails","instance":"dbvt-20260630.htm"},{"htmlFileName":"R81.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R81.htm","longName":"9955566 - Disclosure - Events after the Close of the Period (Details)","shortName":"Events after the Close of the Period (Details)","reportType":"Sheet","menuCategory":"Details","position":81,"role":"http://www.dbv-technologies.com/role/EventsaftertheCloseofthePeriodDetails","instance":"dbvt-20260630.htm"}],"cover":[{"htmlFileName":"R1.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R1.htm","longName":"0000001 - Document - Cover Page","shortName":"Cover Page","reportType":"Sheet","menuCategory":"Cover","position":1,"role":"http://www.dbv-technologies.com/role/CoverPage","instance":"dbvt-20260630.htm"}],"policies":[{"htmlFileName":"R26.htm","url":"https://www.sec.gov/Archives/edgar/data/1613780/000162828026048453/R26.htm","longName":"9955511 - Disclosure - Nature of the business and principles and accounting methods (Policies)","shortName":"Nature of the business and principles and accounting methods (Policies)","reportType":"Sheet","menuCategory":"Policies","position":26,"role":"http://www.dbv-technologies.com/role/NatureofthebusinessandprinciplesandaccountingmethodsPolicies","instance":"dbvt-20260630.htm"}]}}