v3.25.3
Financial assets and liabilities (Details)
€ in Thousands
Sep. 30, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets € 652,052 € 205,228
Financial assets, at fair value 624,744 176,754
Financial liabilities, at fair value € 169,170 € 162,256
Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Percentage of reasonably possible increase in unobservable input, liabilities 1.00% 1.00%
Credit spread | Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Percentage of reasonably possible increase in unobservable input, assets 1.00% 1.00%
Percentage of reasonably possible increase in unobservable input, liabilities   1.00%
LIABILITIES AT FAIR VALUE THROUGH PROFIT AND LOSS    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value € 0 € 24,803
LIABILITIES AT AMORTIZED COST    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 169,170 137,453
Financial liabilities-non current portion    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 109,751 73,497
Financial liabilities-non current portion | LIABILITIES AT FAIR VALUE THROUGH PROFIT AND LOSS    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 0 3,620
Financial liabilities-non current portion | LIABILITIES AT AMORTIZED COST    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 109,751 69,877
Financial liabilities-current portion    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 29,400 44,935
Financial liabilities-current portion | LIABILITIES AT FAIR VALUE THROUGH PROFIT AND LOSS    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 0 21,183
Financial liabilities-current portion | LIABILITIES AT AMORTIZED COST    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 29,400 23,752
Trade payables and other current liabilities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 30,019 43,824
Trade payables and other current liabilities | LIABILITIES AT FAIR VALUE THROUGH PROFIT AND LOSS    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 0 0
Trade payables and other current liabilities | LIABILITIES AT AMORTIZED COST    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities, at fair value 30,019 43,824
ASSETS AT FAIR VALUE THROUGH PROFIT AND LOSS    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 441,318 0
ASSETS AT AMORTIZED COST    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 183,426 176,754
Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 625,114 177,537
Financial liabilities 104,007 157,828
Recurring fair value measurement | Financial liabilities-non current portion    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities € 44,588 € 69,069
Recurring fair value measurement | Kreos & Claret convertible notes (OCABSA) | Credit spread | Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities   0.0750
Recurring fair value measurement | Kreos & Claret Financing, Tranche A,B and C | Credit spread | Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities 0.0850  
Decrease in financial liabilities at fair value € 344 € 538
Recurring fair value measurement | PGE | Credit spread | Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities   0.0900
Decrease in financial liabilities at fair value   € 39
Recurring fair value measurement | Financial liabilities-current portion    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 29,400 44,935
Recurring fair value measurement | Trade payables and other current liabilities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 30,019 43,824
Other financial assets    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 13,904 12,690
Other financial assets | ASSETS AT FAIR VALUE THROUGH PROFIT AND LOSS    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 0 0
Other financial assets | ASSETS AT AMORTIZED COST    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 13,904 12,690
Other financial assets | Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 14,273 13,473
Other receivables and assets    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 21,137 19,843
Other receivables and assets | ASSETS AT FAIR VALUE THROUGH PROFIT AND LOSS    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 0 0
Other receivables and assets | ASSETS AT AMORTIZED COST    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 21,137 19,843
Other receivables and assets | Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 21,137 19,843
Long-term advances made to CROs | Recurring fair value measurement | Credit spread | Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Decrease in financial assets at fair value € 243 € 236
Long-term advances made to CROs | Recurring fair value measurement | Bottom of range | Credit spread | Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets 0.0036 0.0104
Long-term advances made to CROs | Recurring fair value measurement | Top of range | Credit spread | Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets 0.0188 0.0218
Cash and cash equivalents    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value € 589,703 € 144,221
Cash and cash equivalents | ASSETS AT FAIR VALUE THROUGH PROFIT AND LOSS    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 441,318 0
Cash and cash equivalents | ASSETS AT AMORTIZED COST    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets, at fair value 148,385 144,221
Cash and cash equivalents | Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets € 589,703 € 144,221