Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Share-based payments - Summary of Grant Options and Performance Options granted (Details)

v3.24.1.1.u2
Share-based payments - Summary of Grant Options and Performance Options granted (Details)
 1 Months Ended 12 Months Ended
Apr. 30, 2023
€ / shares
Dec. 31, 2023
shares
€ / shares
Dec. 31, 2022
shares
€ / shares
Sep. 18, 2023
shares
Management Incentive Plan        
Average Exercise Price per Share [Abstract]        
Beginning of year (in EUR per share) | € / shares   € 0.12 € 0  
Granted during the period (in EUR per share) | € / shares € 0.12 0 0.12  
Exercised during the period (in EUR per share) | € / shares   0 0  
Forfeited during the period (in EUR per share) | € / shares   0 0  
Ended of year (in EUR per share) | € / shares   0.12 0.12  
Average exercise price per share options, Vested and exercisable (in EUR per share) | € / shares   € 0.12 € 0  
Number Of Grant Options [Abstract]        
Exercised during the period (in shares)   0    
Cancelled during the period (in shares)   0    
End of year (in shares)   2,658,426    
Grant Options | Management Incentive Plan        
Number Of Grant Options [Abstract]        
Beginning of year (in shares)   1,329,213 0  
Granted during the period (in shares)   0 1,329,213  
Exercised during the period (in shares)   0 0  
Forfeited during the period (in shares)   0 0  
End of year (in shares)   1,329,213 1,329,213  
Number of options exercisable (in shares)   1,329,213 0  
Performance Options        
Average Exercise Price per Share [Abstract]        
Granted during the period (in EUR per share) | € / shares   € 0.12    
Performance Options | Management Incentive Plan        
Number Of Grant Options [Abstract]        
Beginning of year (in shares)   1,329,213 0  
Granted during the period (in shares)   0 1,329,213  
Exercised during the period (in shares)   0 0  
Forfeited during the period (in shares)   0 0  
End of year (in shares)   1,329,213 1,329,213  
Number of options exercisable (in shares)   1,329,213 0 996,910
Performance Options | Long-term Incentive Plan        
Average Exercise Price per Share [Abstract]        
Beginning of year (in EUR per share) | € / shares   € 0    
Granted during the period (in EUR per share) | € / shares   0.12    
Exercised during the period (in EUR per share) | € / shares   0    
Forfeited during the period (in EUR per share) | € / shares   0    
Cancelled during the period (in EUR per share) | € / shares   0    
Ended of year (in EUR per share) | € / shares   0.12 € 0  
Average exercise price per share options, Vested and exercisable (in EUR per share) | € / shares   € 0.12    
Number Of Grant Options [Abstract]        
Beginning of year (in shares)   2,220,341 0  
Granted during the period (in shares)     2,798,063  
Exercised during the period (in shares)     0  
Forfeited during the period (in shares)     0  
Cancelled during the period (in shares)   (577,722) (577,722)  
End of year (in shares)     2,220,341  
Number of options exercisable (in shares)   341,377 341,377