Property, plant and equipment - Summary of Depreciation expense (Detail) - EUR (€) € in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of detailed information about property, plant and equipment [line items] | |||
| Depreciation, property, plant and equipment | € (9,031) | € (8,626) | € (3,287) |
| Research and development expenses [Member] | |||
| Disclosure of detailed information about property, plant and equipment [line items] | |||
| Depreciation, property, plant and equipment | (6,911) | (6,600) | (2,419) |
| General and administrative expenses [Member] | |||
| Disclosure of detailed information about property, plant and equipment [line items] | |||
| Depreciation, property, plant and equipment | € (2,120) | € (2,026) | € (868) |