v3.26.3
Financial liabilities - Disclosure of reconciliation of liabilities arising from financing activities (Details) - EUR (€)
€ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Jun. 30, 2026
Jun. 30, 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
Repayments   (648) (13,032)
Interest paid   (24) (3,868)
Repurchase settled in cash   (38,233)  
Non cash changes: repurchase settled in shares   (38,455)  
Non-cash changes: (gain)/loss on recognition or derecognition   43,205 (295)
Non-cash changes: interest expense and other   3,270 8,056
Non-cash changes: other fair value remeasurement     (1,339)
Non cash changes : Effect of the change in foreign currency exchange rates   4 (32)
Liabilities arising from financing activities at end of period € 32,093 1,212 98,709
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
Repayments   0 0
Interest paid   0 (1,125)
Repurchase settled in cash   0  
Non cash changes: repurchase settled in shares   0  
Non-cash changes: (gain)/loss on recognition or derecognition   0 0
Non-cash changes: interest expense and other   0 2,048
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 0 24,293
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
Repayments   0 (9,140)
Interest paid   0 (1,974)
Repurchase settled in cash   0  
Non cash changes: repurchase settled in shares   0  
Non-cash changes: (gain)/loss on recognition or derecognition   0 0
Non-cash changes: interest expense and other   0 4,136
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 0 39,423
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
Repayments   0 (2,188)
Interest paid   0 (689)
Repurchase settled in cash   0  
Non cash changes: repurchase settled in shares   0  
Non-cash changes: (gain)/loss on recognition or derecognition   0 (295)
Non-cash changes: interest expense and other   0 680
Non-cash changes: other fair value remeasurement     (1,339)
Non cash changes : Effect of the change in foreign currency exchange rates   0 0
Liabilities arising from financing activities at end of period 0 0 17,743
PGE      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Liabilities arising from financing activities at beginning of period   0 2,488
Repayments (1,264) 0 (1,250)
Interest paid   0 (43)
Repurchase settled in cash   0  
Non cash changes: repurchase settled in shares   0  
Non-cash changes: (gain)/loss on recognition or derecognition   0 0
Non-cash changes: interest expense and other   0 44
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 0 1,238
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
Repayments   (648) (454)
Interest paid   (24) (36)
Repurchase settled in cash   0  
Non cash changes: repurchase settled in shares   0  
Non-cash changes: (gain)/loss on recognition or derecognition   0 0
Non-cash changes: interest expense and other   24 36
Non-cash changes: other fair value remeasurement     0
Non cash changes : Effect of the change in foreign currency exchange rates   4 (32)
Liabilities arising from financing activities at end of period 1,856 1,212 1,876
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
Repayments   0 0
Interest paid   0 0
Repurchase settled in cash   (38,233)  
Non cash changes: repurchase settled in shares   (38,455)  
Non-cash changes: (gain)/loss on recognition or derecognition   43,205 0
Non-cash changes: interest expense and other   3,246 1,112
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 € 30,237 € 0 € 14,135