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Intangible assets - Disclosure of detailed information about intangible assets (Details) - EUR (€) € in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets other than goodwill at beginning of period | € 416 | € 1,556
Acquisitions | 0 | 0
Additional considerations | 0 | 2,000
Disposals | 0 | 0
Amortizations | (297) | (2,651)
Transfers | 0 | 0
Intangible assets other than goodwill at end of period | 119 | 903
Monalizumab agreement |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Amortizations | (294) | (651)
Agreement with Orega Biotech |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Amortizations |  | (2,000)
Purchased licenses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets other than goodwill at beginning of period | 413 | 1,556
Acquisitions | 0 | 0
Additional considerations | 0 | 2,000
Disposals | 0 | 0
Amortizations | (294) | (2,651)
Transfers | 0 | 0
Intangible assets other than goodwill at end of period | 119 | 903
Other intangible assets |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets other than goodwill at beginning of period | 3 | 0
Acquisitions | 0 | 0
Additional considerations | 0 | 0
Disposals | 0 | 0
Amortizations | (3) | 0
Transfers | 0 | 0
Intangible assets other than goodwill at end of period | 0 | 0
In progress |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets other than goodwill at beginning of period | 0 | 0
Acquisitions | 0 | 0
Additional considerations | 0 | 0
Disposals | 0 | 0
Amortizations | 0 | 0
Transfers | 0 | 0
Intangible assets other than goodwill at end of period | € 0 | € 0

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