XML 180 R131.htm IDEA: XBRL DOCUMENT v3.21.1
Related Party Disclosures - Summary of Outstanding Balances of Transactions Related to Key Management Personnel (Details) - Key Management Personnel of Entity or Parent - EUR (€)
€ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Transactions Between Related Parties [Line Items]    
Outstanding balances € 1,236 € 1,843
Consulting Service Provider    
Disclosure Of Transactions Between Related Parties [Line Items]    
Outstanding balances 7  
TRON    
Disclosure Of Transactions Between Related Parties [Line Items]    
Outstanding balances € 1,229 € 1,843