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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents by Geographic Area (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of geographical areas [line items]      
Cash € 20,322 € 33,610 € 54,475
Europe [member]      
Disclosure of geographical areas [line items]      
Cash 10,486 15,356  
Asia [member]      
Disclosure of geographical areas [line items]      
Cash 5,069 13,449  
North America [member]      
Disclosure of geographical areas [line items]      
Cash 3,261 3,659  
South America [member]      
Disclosure of geographical areas [line items]      
Cash 1,337 1,061  
Other [member]      
Disclosure of geographical areas [line items]      
Cash € 169 € 85