v3.26.1
NON-CURRENT AND CURRENT FINANCIAL LIABILITIES - XJ Harbour Set-off agreement (Details)
12 Months Ended
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
EUR (€)
$ / shares
Dec. 31, 2023
Dec. 31, 2025
$ / shares
FINANCIAL LIABILITIES AND WARRANTS        
Fair value of financial liability recognized for shares delivered € 54,846,000 € 54,846,000    
Price per share | $ / shares   € 2.15    
Carrying amount of the financial liability extinguished 34,337,000      
XJ Harbour HK Limited | STG        
FINANCIAL LIABILITIES AND WARRANTS        
Percent of ownership interest in equity method investees     24.10%  
XJ Harbour Set-off agreement        
FINANCIAL LIABILITIES AND WARRANTS        
Conversion share price | $ / shares       $ 2.15
Fair value, financial liabilities 64,267,000 € 64,267,000    
Fair value of embedded derivative liability 9,459,000 9,459,000    
Fair value of derivative financial asset arising from contractual limitations 7,713,000 7,713,000    
Cash consideration € 22,666 € 22,666