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Income Tax Expense - Additional Information (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income tax [line items]      
Profit / (loss) before tax € 8,774 € (20,565) € (31,345)
Income tax expense € 4,389 4,341 € 2,335
Effective income tax rates 50.00%    
Current income tax receivable € 2,032 1,255  
Deferred tax assets € 1,295 2,023  
Maximum percentage of permitted tax loss carry forwards can be utilized to off set 80.00%    
Current income tax payable € 2,740 1,134  
Tax on unremitted earnings of subsidiaries [member]      
Income tax [line items]      
Tax effect of unremitted earnings 1,051 € 507  
Tax on dividends distribution Of Subsidiaries [member]      
Income tax [line items]      
Tax effect of aforementioned retained earnings recognized € 576    
IRAP (regional tax) [member]      
Income tax [line items]      
Applicable tax rate 4.82% 4.82% 4.82%
Increase in applicable tax rate 0.92% 0.92% 0.92%
Current tax rate 3.90% 3.90% 3.90%
IRES (state tax) [member]      
Income tax [line items]      
Applicable tax rate 24.00% 24.00% 24.00%
Income tax expense € (4,389) € (4,341) € (2,335)
Tax effect of unremitted earnings (515) (1,024) € (430)
Uncertain tax treatment [Member]      
Income tax [line items]      
Current income tax payable 300 € 0  
Uncertain tax treatment [Member] | Bottom of range [member]      
Income tax [line items]      
Current income tax payable 200    
Uncertain tax treatment [Member] | Top of range [member]      
Income tax [line items]      
Current income tax payable € 400