Other current and non-current assets - Additional Information (Detail) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Other Current And Non-Current Asset [Abstract] | ||
| Prepaid maintenance expenses | € 1.0 | € 1.2 |
| Prepaid expense for supply of clinical materials | 2.7 | |
| Upfront payment for commercial supply | 0.9 | |
| Prepaid expenses for services | 0.8 | |
| Prepaid expenses for clinical research organizations insurance and other services | 7.2 | |
| Prepaid expenses of licenses and software | 3.4 | 3.6 |
| Capital gains tax receivable | € 13.0 | € 5.9 |