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Income Tax Expense - Summary of Total Income Taxes (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Income Taxes [line items]      
Current tax expense income € (2,420) € (5,286) € (3,766)
Deferred tax liability asset 147 897 (575)
Total (2,273) (4,389) (4,341)
Domestic [member]      
Disclosure Of Income Taxes [line items]      
Current tax expense income (838) (2,116) (2,221)
Deferred tax liability asset     430
Foreign [member]      
Disclosure Of Income Taxes [line items]      
Current tax expense income (1,582) (3,170) (1,545)
Deferred tax liability asset € 147 € 897 € (1,005)