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Income Tax Expense - Additional Information (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income tax [line items]      
Profit / (loss) before tax € (15,072) € 3,561 € 8,774
Income tax expense 1,090 2,273 € 4,389
Current income tax receivable 3,000 2,195  
Deferred tax assets € 1,975 1,965  
Maximum percentage of permitted tax loss carry forwards can be utilized to off set 80.00%    
Current income tax payable € 339 1,874  
Tax on unremitted earnings of subsidiaries [member]      
Income tax [line items]      
Tax effect of unremitted earnings 1,090 1,129  
Tax on dividends distribution Of Subsidiaries [member]      
Income tax [line items]      
Tax effect of aforementioned retained earnings recognized € 516 € 516  
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 € (1,090) € (2,273) € (4,389)
Tax effect of unremitted earnings € 0 (755) € (515)
Uncertain tax treatment [Member]      
Income tax [line items]      
Current income tax payable   € 300