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Property, Plant and Equipment - Summary of Breakdown of Property, Plant and Equipment by Country (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment € 84,517 € 84,431 € 83,054
Italy [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 44,239 46,610  
United States of America [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 18,259 14,807  
Romania [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 17,520 17,952  
Brazil [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 3,167 3,092  
Europe [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 919 957  
China [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 166 695  
Other countries [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment € 247 € 318