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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, 2021
Dec. 31, 2020
Deferred Tax Assets And Liabilities [line items]    
Deferred tax assets € 1,295 € 2,023
Net deferred tax assets 886 531
Deferred tax liabilities (996) (1,024)
Deferred tax liabilities compensated [member]    
Deferred Tax Assets And Liabilities [line items]    
Deferred tax liabilities compensated € (409) € (1,492)