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Other Payables - Additional Information (Detail) - EUR (€)
€ in Thousands
12 Months Ended
Mar. 02, 2020
Dec. 31, 2021
Feb. 28, 2020
Trade And Other Current Payables [Abstract]      
Payment received from parents majority shareholder   € 2,500  
Subscription price of a future rights issue     € 15,000
Partial receipt of subscription price of a future rights issue € 2,500    
Amount paid back to parent's majority shareholder   € 2,500