Related parties - Summary of Compensation to Key Management Personnel (Detail) - EUR (€) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of transactions between related parties [abstract] | ||||
| Short term employee benefits | € 985,136 | € 1,208,362 | € 3,807,354 | € 2,617,978 |
| Post employee benefits | 67,732 | 62,837 | 141,331 | 133,012 |
| Share-based payments | 3,804,580 | 3,091,132 | 6,651,041 | 5,952,342 |
| Total | € 4,857,448 | € 4,362,331 | € 10,599,726 | € 8,703,332 |