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Basis of Preparation - Additional Information (Detail) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Basis of preparation [Abstract]      
Operating losses € (225,324) € (62,808) € (124,271)
Net losses (239,751) (76,452) € (135,657)
Accumulated losses € (442,618) € (224,328)