Relationships with Related Parties - Additional Information (Detail) $ in Thousands	6 Months Ended
Jun. 30, 2023 USD ($)
Related Party Transactions [Abstract]
Increase decrease in related party transactions and changes in nature of the transactions	$ 0

Increase decrease in related party transactions and changes in nature of the transactions.

No definition available.

Name:	dbvt_IncreaseDecreaseInRelatedPartyTransactionsAndChangesInNatureOfTheTransactions
Namespace Prefix:	dbvt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration