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Trade and Other Receivables - Expected credit loss on trade receivables (Details) - EUR (€)
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of Trade And Other Receivables [Line Items]        
Trade receivables from non-related parties € 51,467,000 € 26,802,000 € 17,635,000  
Contract assets 37,609,000 8,880,000 19,999,000 € 843,000
Not due        
Disclosure of Trade And Other Receivables [Line Items]        
Total 86,638,000 18,519,000 37,196,000  
Not due | Gross carrying amount [member]        
Disclosure of Trade And Other Receivables [Line Items]        
Trade receivables from non-related parties 49,029,000 9,639,000 17,197,000  
Contract assets 37,609,000 8,880,000 19,999,000  
Overdue 1-30 days        
Disclosure of Trade And Other Receivables [Line Items]        
Total   14,287,000 438,000  
Overdue 1-30 days | Gross carrying amount [member]        
Disclosure of Trade And Other Receivables [Line Items]        
Trade receivables from non-related parties   14,287,000 438,000  
Overdue 31 to 60 days        
Disclosure of Trade And Other Receivables [Line Items]        
Total 2,373,000 603,000    
Overdue 31 to 60 days | Gross carrying amount [member]        
Disclosure of Trade And Other Receivables [Line Items]        
Trade receivables from non-related parties 2,373,000 603,000    
Overdue +61 days        
Disclosure of Trade And Other Receivables [Line Items]        
Total 65,000 2,273,000    
Overdue +61 days | Gross carrying amount [member]        
Disclosure of Trade And Other Receivables [Line Items]        
Trade receivables from non-related parties 65,000 2,273,000    
Total        
Disclosure of Trade And Other Receivables [Line Items]        
Total 89,076,000 35,682,000 37,634,000  
Total | Gross carrying amount [member]        
Disclosure of Trade And Other Receivables [Line Items]        
Trade receivables from non-related parties 51,467,000 26,802,000 17,635,000  
Contract assets € 37,609,000 € 8,880,000 € 19,999,000