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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, 2022
Dec. 31, 2021
Deferred Tax Assets And Liabilities [line items]    
Deferred tax assets € 1,965 € 1,295
Net deferred tax assets 1,032 886
Deferred tax liabilities (996) (996)
Deferred tax liabilities compensated [member]    
Deferred Tax Assets And Liabilities [line items]    
Deferred tax liabilities compensated € (933) € (409)