v3.26.1
Financial Instruments - Disclosure of credit quality of financial assets (Details) - EUR (€)
€ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of external credit grades [line items]        
TRADE RECEIVABLES € 27,813 € 35,205    
OTHER ASSETS 356 1,256    
CASH AND CASH EQUIVALENTS 109,650 168,271 € 126,080 € 286,532
Receivables from governmental institutions (AAA-country)        
Disclosure of external credit grades [line items]        
TRADE RECEIVABLES 377 0    
Receivables from governmental institutions (AA-country)        
Disclosure of external credit grades [line items]        
TRADE RECEIVABLES 7,025 5,202    
Receivables from counterparties with credit rating A        
Disclosure of external credit grades [line items]        
TRADE RECEIVABLES 13,203 3,184    
Receivables from counterparties without external credit rating or rating below A        
Disclosure of external credit grades [line items]        
TRADE RECEIVABLES 7,128 26,744    
Contract assets from counterparties with credit rating A        
Disclosure of external credit grades [line items]        
TRADE RECEIVABLES 0 0    
Contract assets from counterparties without external credit rating or rating below A        
Disclosure of external credit grades [line items]        
TRADE RECEIVABLES 80 75    
Counterparties with external credit rating or rating AA        
Disclosure of external credit grades [line items]        
CASH AND CASH EQUIVALENTS 5,342 8,921    
Counterparties with external credit rating or rating A        
Disclosure of external credit grades [line items]        
CASH AND CASH EQUIVALENTS 104,308 156,135    
Counterparties without external credit rating or rating below A        
Disclosure of external credit grades [line items]        
OTHER ASSETS 356 1,256    
CASH AND CASH EQUIVALENTS € 0 € 3,214