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Operating Income - Additional Information (Detail) € in Millions | Dec. 31, 2017 EUR (€)
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Disclosure of finance income costs [abstract] |
Deferred revenue | € 9.5

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- Definition Disclosure of finance income costs. + References No definition available. + Details
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Namespace Prefix: | dbvt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of liability representing income that has been received but is not yet earned. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DeferredIncome
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant