Research and development expenses - Additional Information (Detail)	12 Months Ended
Dec. 31, 2021 EUR (€)
AnalytiCon [Member] \| Phase 2 Development [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
License costs consist milestone payment	€ 500,000

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

No definition available.

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