v3.26.1
FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Liquidity risk (Details) - EUR (€)
€ in Thousands
Apr. 24, 2026
Dec. 31, 2025
Dec. 31, 2024
Setoff and Debt Assumption Agreements      
Credit-risk rating      
Financial liability agreed to be settled through issuance of equity € 30,800    
Loans from shareholders | Setoff and Debt Assumption Agreements      
Credit-risk rating      
Financial liability agreed to be settled through issuance of equity 21,900    
Loans from related parties | Setoff and Debt Assumption Agreements      
Credit-risk rating      
Financial liability agreed to be settled through issuance of equity 6,500    
Loans from other third parties | Setoff and Debt Assumption Agreements      
Credit-risk rating      
Financial liability agreed to be settled through issuance of equity € 2,400    
Liquidity Risk | Lease liabilities      
Credit-risk rating      
Carrying amount, financial liabilities   € 10,688 € 14,131
Liquidity Risk | Loans from banks      
Credit-risk rating      
Carrying amount, financial liabilities   2,423  
Liquidity Risk | Loans from other third parties      
Credit-risk rating      
Carrying amount, financial liabilities   8,348 2,790
Liquidity Risk | Loans from shareholders      
Credit-risk rating      
Carrying amount, financial liabilities   26,261 30,877
Liquidity Risk | Loans from other related parties      
Credit-risk rating      
Carrying amount, financial liabilities   19,975 39,365
Liquidity Risk | Trade payables and other liabilities      
Credit-risk rating      
Carrying amount, financial liabilities   28,179 28,179
Liquidity Risk | 1 year | Lease liabilities      
Credit-risk rating      
Carrying amount, financial liabilities   1,902 2,108
Liquidity Risk | 1 year | Loans from banks      
Credit-risk rating      
Carrying amount, financial liabilities   1,232  
Liquidity Risk | 1 year | Loans from other third parties      
Credit-risk rating      
Carrying amount, financial liabilities   3,114 727
Liquidity Risk | 1 year | Loans from shareholders      
Credit-risk rating      
Carrying amount, financial liabilities   4,611 9,216
Liquidity Risk | 1 year | Loans from other related parties      
Credit-risk rating      
Carrying amount, financial liabilities   8,634 24,971
Liquidity Risk | 1 year | Trade payables and other liabilities      
Credit-risk rating      
Carrying amount, financial liabilities   28,179 28,179
Liquidity Risk | > 1 2 years | Lease liabilities      
Credit-risk rating      
Carrying amount, financial liabilities   1,452 1,928
Liquidity Risk | > 1 2 years | Loans from banks      
Credit-risk rating      
Carrying amount, financial liabilities   1,191  
Liquidity Risk | > 1 2 years | Loans from other third parties      
Credit-risk rating      
Carrying amount, financial liabilities   5,234 2,063
Liquidity Risk | > 1 2 years | Loans from shareholders      
Credit-risk rating      
Carrying amount, financial liabilities   21,651 21,661
Liquidity Risk | > 1 2 years | Loans from other related parties      
Credit-risk rating      
Carrying amount, financial liabilities   11,341 14,394
Liquidity Risk | > 2 5 years | Lease liabilities      
Credit-risk rating      
Carrying amount, financial liabilities   3,733 4,081
Liquidity Risk | > 5 years | Lease liabilities      
Credit-risk rating      
Carrying amount, financial liabilities   € 3,600 € 6,014