v3.25.4

Revenue - Schedule of Revenue Attributable to Commercial Customers by Product (Detail) - Commercial customers [member] - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of operating segments [line items] |  |  |
Revenue from contracts with customers | € 683,572 | € 225,728 | € 178,663
YORVIPATH [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue from contracts with customers | 477,412 | 28,727 |
SKYTROFA [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue from contracts with customers | € 206,160 | € 197,001 | € 178,663

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