v3.26.1
Financial liabilities - Disclosure of reconciliation of liabilities arising from financing activities (Details) - EUR (€)
€ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period € 32,093 € 109,218
Proceeds   0
Repayments (412) (6,122)
Interest paid (13) (1,962)
Non-cash changes: (gain)/loss on recognition or derecognition   (147)
Non-cash changes: interest expense and other 2,540 4,535
Non-cash changes: other fair value remeasurement   1,051
Non cash changes : Effect of the change in foreign currency exchange rates 3 (11)
Liabilities arising from financing activities at end of period 34,210 106,563
Kreos & Claret convertible notes (OCABSA)    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 0 23,370
Proceeds   0
Repayments 0 0
Interest paid 0 (563)
Non-cash changes: (gain)/loss on recognition or derecognition   0
Non-cash changes: interest expense and other 0 1,012
Non-cash changes: other fair value remeasurement   0
Non cash changes : Effect of the change in foreign currency exchange rates 0 0
Liabilities arising from financing activities at end of period 0 23,819
Kreos & Claret bond loans    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 0 46,401
Proceeds   0
Repayments 0 (3,705)
Interest paid 0 (1,019)
Non-cash changes: (gain)/loss on recognition or derecognition   0
Non-cash changes: interest expense and other 0 2,155
Non-cash changes: other fair value remeasurement   0
Non cash changes : Effect of the change in foreign currency exchange rates 0 0
Liabilities arising from financing activities at end of period 0 43,832
Heights convertible notes    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 0 21,574
Proceeds   0
Repayments 0 (2,188)
Interest paid 0 (361)
Non-cash changes: (gain)/loss on recognition or derecognition   (147)
Non-cash changes: interest expense and other 0 344
Non-cash changes: other fair value remeasurement   1,051
Non cash changes : Effect of the change in foreign currency exchange rates 0 0
Liabilities arising from financing activities at end of period 0 20,273
PGE    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 0 2,488
Proceeds   0
Repayments 0 0
Interest paid 0 0
Non-cash changes: (gain)/loss on recognition or derecognition   0
Non-cash changes: interest expense and other 0 22
Non-cash changes: other fair value remeasurement   0
Non cash changes : Effect of the change in foreign currency exchange rates 0 0
Liabilities arising from financing activities at end of period 0 2,510
Lease liabilities    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 1,856 2,363
Proceeds   0
Repayments (412) (230)
Interest paid (13) (19)
Non-cash changes: (gain)/loss on recognition or derecognition   0
Non-cash changes: interest expense and other 13 19
Non-cash changes: other fair value remeasurement   0
Non cash changes : Effect of the change in foreign currency exchange rates 3 (11)
Liabilities arising from financing activities at end of period 1,447 2,122
Royalty certificates    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 30,237 13,023
Proceeds   0
Repayments 0 0
Interest paid 0 0
Non-cash changes: (gain)/loss on recognition or derecognition   0
Non-cash changes: interest expense and other 2,527 983
Non-cash changes: other fair value remeasurement   0
Non cash changes : Effect of the change in foreign currency exchange rates 0 0
Liabilities arising from financing activities at end of period € 32,764 € 14,006