Share-based payments - Summary of Employee Related Share Based Compensation Expense (Detail) - EUR (€) € in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Detailed Information About Share Based Compensation Expense [Line Items] | |||
| Share-based compensation expense | € (15,015) | € (17,642) | € (20,705) |
| Research and development expenses [Member] | |||
| Disclosure Of Detailed Information About Share Based Compensation Expense [Line Items] | |||
| Share-based compensation expense | (7,538) | (9,587) | (11,972) |
| General and administrative expenses [Member] | |||
| Disclosure Of Detailed Information About Share Based Compensation Expense [Line Items] | |||
| Share-based compensation expense | € (7,477) | € (8,055) | € (8,733) |