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Income Tax Expense - Summary of Movements in deferred Tax Balances (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred Tax Assets And Liabilities [line items]      
initial balance € (492) € 83 € 433
Recognised in profit or loss 382 (575) (350)
Final balance (110) (492) 83
Deferred tax assets [member]      
Deferred Tax Assets And Liabilities [line items]      
initial balance 2,023 1,974 2,027
Recognised in profit or loss (728) 49 (53)
Final balance 1,295 2,023 1,974
Deferred tax liability [member]      
Deferred Tax Assets And Liabilities [line items]      
initial balance (2,515) (1,891) (1,594)
Recognised in profit or loss 1,110 (624) (297)
Final balance € (1,405) € (2,515) € (1,891)