Relationships with Related Parties - Additional Information (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($) transaction
Related Party Transaction [Line Items]
Number of related party transactions \| transaction	2
Subsidiaries \| DBV Technologies Inc.
Related Party Transaction [Line Items]
Capital contribution to wholly owned subsidiary \| $	$ 5.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details