v3.26.1
Share-Based Payments - Summary of Information on Warrants Activity (Details) - Warrants [Member]
12 Months Ended
Dec. 31, 2025
€ / shares
Dec. 31, 2024
€ / shares
Dec. 31, 2023
€ / shares
Dec. 31, 2022
€ / shares
Disclosure Of Number And Weighted Average Exercise Prices Of Share Options and awards [Line Items]        
Option exercisable, beginning balance 338,875 338,875 896,225  
Option exercisable, forfeited or expired     557,350  
Option exercisable, ending balance 117,938 338,875 338,875 896,225
Weighted- average exercise price per share, beginning balance € 26.69 € 26.69 € 27.18  
Weighted- average exercise price per share, forfeited or expired     27.48  
Weighted- average exercise price per share, ending balance € 19.35 € 26.69 € 26.69 € 27.18
Option outstanding, beginning balance 338,875 338,875 896,225  
Option outstanding, granted 75,000 0 0  
Option Outstanding, exercised 0 0 0  
Option outstanding, forfeited, cancelled or expired (244,375) 0 (557,350)  
Option outstanding, ending balance 169,500 338,875 338,875 896,225
Weighted average exercise price per share, beginning balance € 26.69 € 26.69 € 27.18  
Weighted average exercise price per share, granted 2.59 0 0  
Weighted average exercise price per share, exercised 0 0 0  
Weighted average exercise price per share, forfeited or expired 27.91 0 27.48  
Weighted average exercise price per share, ending balance € 14.25 € 26.69 € 26.69 € 27.18
Remaining Average Useful Life 4 years 9 months 18 days 1 year 4 months 24 days 2 years 4 months 24 days 3 years 3 months 18 days