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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) |

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