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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
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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 |

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