v3.26.3
Share-based compensation, Options Activity (Details) - Options [Member]
shares in Thousands
6 Months Ended
Jun. 30, 2026
€ / shares
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
shares
Number of Options [Roll Forward]        
Outstanding at beginning of period (in shares) | shares   440    
Granted (in shares) | shares   0    
Exercised (in shares) | shares   0    
Forfeited or expired (in shares) | shares   0    
Outstanding at end of year (in shares) | shares   440    
Exercisable at end of year (in shares) | shares       0
Weighted Average Exercise Price [Abstract]        
Outstanding at beginning of period (in euros per share) | € / shares € 1      
Granted (in euros per share) | € / shares 1      
Exercised (in euros per share) | € / shares 1      
Forfeited or expired (in euros per share) | € / shares 1      
Outstanding at end of year (in euros per share) | € / shares 1      
Exercisable at end of year (in euros per share) | € / shares € 0      
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value [Abstract]        
Outstanding, weighted average remaining contractual term   3 years    
Outstanding, aggregate intrinsic value | $       $ 2,148,000
Exercisable, aggregate intrinsic value | $       0
Unrecognized Compensation Cost [Abstract]        
Unrecognized compensation cost related to nonvested share-based compensation arrangements | $       $ 502,248
Weighted-average period over which unrecognized compensation cost will be recognized   2 years    
Share-based compensation | $   $ 125,430 $ 115,044  
Payments for stock options exercised | $   $ 0