XML 42 R42.htm IDEA: XBRL DOCUMENT v3.19.2

Non-Current Financial Assets - Additional Information (Detail)	Jun. 30, 2019 shares
Liquidity contract [member]
Disclosure of non financial assets.
Number of treasury shares	34,952

X

- Definition

Disclosure of non financial assets [Line Items]

+ References

No definition available.

+ Details

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

X

- Definition

Number of treasury shares.

+ References

No definition available.

+ Details

Name:	dbvt_NumberOfTreasuryShares
Namespace Prefix:	dbvt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=dbvt_LiquidityConctractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: