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Income Tax Expense - Summary of Reconciliation of Deferred Tax Assets and Liabilities Included in Consolidated Statements of Financial Position (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Deferred Tax Assets And Liabilities [line items]    
Deferred tax assets € 1,975 € 1,965
Net deferred tax assets 1,665 1,032
Deferred tax liabilities (996) (996)
Deferred tax liabilities compensated [member]    
Deferred Tax Assets And Liabilities [line items]    
Deferred tax liabilities compensated € (310) € (933)