v3.26.1
Disclosure on Individual Items of the Consolidated Financial Statements - Schedule of Fair Value (Details) - EUR (€)
€ in Thousands
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Financial Assets [Member]    
Financial assets    
Financial assets, Carrying amount € 44,028 € 36,126
Financial assets, Fair value 44,028 36,126
Financial liabilities [Member]    
Financial liabilities    
Financial liabilities, Carrying amount 127,379 168,510
Financial liabilities, Fair value € 132,627 165,030
Level 3 Hierarchy [Member] | Cash and cash equivalents [Member]    
Financial assets    
Financial assets, Classification At amortized cost  
Financial assets, Carrying amount € 37,869 22,858
Financial assets, Fair value € 37,869 22,858
Level 3 Hierarchy [Member] | Trade receivables (current) [Member]    
Financial assets    
Financial assets, Classification At amortized cost  
Financial assets, Carrying amount € 6,085 9,900
Financial assets, Fair value € 6,085 9,900
Level 3 Hierarchy [Member] | Other investments (non-current) [Member]    
Financial assets    
Financial assets, Classification At amortized cost  
Financial assets, Carrying amount € 5 5
Financial assets, Fair value € 5 5
Level 3 Hierarchy [Member] | Other financial receivables (current) [Member]    
Financial assets    
Financial assets, Classification At amortized cost  
Financial assets, Carrying amount € 63 3,358
Financial assets, Fair value € 63 3,358
Level 3 Hierarchy [Member] | Other financial receivables (non-current) [Member]    
Financial assets    
Financial assets, Classification At amortized cost  
Financial assets, Carrying amount € 6 6
Financial assets, Fair value € 6 6
Level 3 Hierarchy [Member] | Loans and borrowings (non-current) [Member]    
Financial liabilities    
Financial liabilities, Classification At amortized cost  
Financial liabilities, Carrying amount € 9,224
Financial liabilities, Fair value € 16,074
Level 3 Hierarchy [Member] | Loans and borrowings (current) [Member]    
Financial liabilities    
Financial liabilities, Classification At amortized cost  
Financial liabilities, Carrying amount € 24,711 13,333
Financial liabilities, Fair value € 26,044 13,333
Level 3 Hierarchy [Member] | Trade payables (current) [Member]    
Financial liabilities    
Financial liabilities, Classification At amortized cost  
Financial liabilities, Carrying amount € 12,100 29,299
Financial liabilities, Fair value € 12,100 29,299
Level 3 Hierarchy [Member] | Trade payables due to related parties (current) [Member]    
Financial liabilities    
Financial liabilities, Classification At amortized cost  
Financial liabilities, Carrying amount € 1,045 2,601
Financial liabilities, Fair value € 1,045 2,601
Level 3 Hierarchy [Member] | Lease liabilities (non-current) [Member]    
Financial liabilities    
Financial liabilities, Classification At amortized cost  
Financial liabilities, Carrying amount € 1,882 2,336
Financial liabilities, Fair value
Level 3 Hierarchy [Member] | Lease liabilities (current) [Member]    
Financial liabilities    
Financial liabilities, Classification At amortized cost  
Financial liabilities, Carrying amount € 1,054 1,144
Financial liabilities, Fair value
Level 3 Hierarchy [Member] | Other payables financial (current) [Member]    
Financial liabilities    
Financial liabilities, Classification At amortized cost  
Financial liabilities, Carrying amount € 387 215
Financial liabilities, Fair value € 387 215
Level 2 Hierarchy [Member] | Warrant liabilities - private [Member]    
Financial liabilities    
Financial liabilities, Classification FVTPL  
Financial liabilities, Carrying amount € 13,155 39,997
Financial liabilities, Fair value € 13,155 39,997
Level 2 Hierarchy [Member] | Warrant liabilities - Shareholder loan [Member]    
Financial liabilities    
Financial liabilities, Classification FVTPL  
Financial liabilities, Carrying amount € 56,733 78,849
Financial liabilities, Fair value € 56,733 78,849
Level 2 Hierarchy [Member] | Warrant liabilities - Convertible Notes [Member]    
Financial liabilities    
Financial liabilities, Classification FVTPL  
Financial liabilities, Carrying amount € 6,616
Financial liabilities, Fair value € 6,616
Level 1 Hierarchy [Member] | Warrant liabilities - public [Member]    
Financial liabilities    
Financial liabilities, Classification FVTPL  
Financial liabilities, Carrying amount € 473 734
Financial liabilities, Fair value € 473 € 734