Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Other financial assets - Pledged bank balances (Details)

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Other financial assets - Pledged bank balances (Details) - Pledged bank balances - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of Other financial assets [Line Items]    
Decrease of other financial assets € 6,697  
Non current payables of interest and commitment fee 10,500 € 17,257
Non-current trade payables 430 430
Pledged Bank balance for security 1,200 1,200
More than one year    
Disclosure of Other financial assets [Line Items]    
Non current pledged bank balance 12,190 € 18,887
Later than three months and not later than one year    
Disclosure of Other financial assets [Line Items]    
Non current pledged bank balance € 0