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Supplier Accounts Payable and Other Current Liabilities - Additional Information (Detail) - EUR (€) € in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure Of Supplier Accounts And Other Current Liabilities [abstract]
Supplier accounts and related payables term	1 year
Current part of deferred revenue	€ 5,470	€ 4,360

X

- Definition

Disclosure of supplier accounts and other current liabilities.

+ References

No definition available.

+ Details

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Namespace Prefix:	dbvt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Supplier accounts and related payables term.

+ References

No definition available.

+ Details

Name:	dbvt_SupplierAccountsAndRelatedPayablesTerm
Namespace Prefix:	dbvt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of deferred income classified as current. [Refer: Deferred income]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78&doctype=Standard
-URIDate 2018-03-16

+ Details

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Balance Type:	credit
Period Type:	instant