v3.26.1
Company information - Ordinary shares of Hepalys (Details)
€ / shares in Units, € in Thousands, $ in Millions
12 Months Ended
Oct. 11, 2023
shares
Sep. 29, 2023
USD ($)
Sep. 26, 2023
¥ / shares
Sep. 26, 2023
€ / shares
Sep. 20, 2023
¥ / shares
Sep. 20, 2023
€ / shares
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Dec. 31, 2023
EUR (€)
Collaborative Arrangements                  
Issue of equity | €             € 284,621 € 57,338 € 30,587
Hepalys Pharma, Inc                  
Collaborative Arrangements                  
Issue of equity | $   $ 13              
Group's share in %   15.00%         15.00% 15.00% 15.00%
Catalys Option Agreement | Hepalys Pharma, Inc                  
Collaborative Arrangements                  
Number of shares acquired in associate | shares 1,500,000                
Option to acquire shares in company, percentage     30.00% 30.00% 30.00% 30.00%      
Purchase of interests in investments accounted for using equity method, price per share | (per share)     ¥ 300 € 1.9 ¥ 300 € 1.9