Trade Payables and Other Liabilities - Additional Information (Details) $ in Millions	9 Months Ended
Sep. 30, 2025 USD ($)
Payables and Accruals [Abstract]
Increase in trade accounts payable	$ 17.8

Increase (Decrease) In Trade Accounts Payable, Net Of Foreign Exchange Impact

No definition available.

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