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Operating expenses - Additional information (Details) € in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2024 EUR (€) employee | Jun. 30, 2023 EUR (€) employee
Disclosure of operating expenses [Line Items] |  |
Personnel expenses other than share-based compensation | € 11,002 | € 11,652
Number of employees | employee | 168 | 191
Amortisation, intangible assets other than goodwill | € 297 | € 2,651
R&D |  |
Disclosure of operating expenses [Line Items] |  |
Number of employees | employee | 135 | 151
Administration |  |
Disclosure of operating expenses [Line Items] |  |
Number of employees | employee | 39 | 45
Agreement with Orega Biotech |  |
Disclosure of operating expenses [Line Items] |  |
Amortisation, intangible assets other than goodwill |  | € 2,000
Monalizumab agreement |  |
Disclosure of operating expenses [Line Items] |  |
Amortisation, intangible assets other than goodwill | € 294 | € 651

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