v3.26.1
Property and equipment (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Reconciliation of changes in property, plant and equipment [abstract]      
Property, plant and equipment including right-of-use assets at beginning of period € 5,133 € 6,322 € 8,542
Acquisitions 644 392 352
Disposals (23) (19) (608)
Depreciation (1,384) (1,576) (1,948)
Transfers 0 0 0
Foreign exchange variation (13) 15  
Property, plant and equipment including right-of-use assets at end of period 4,356 5,133 6,322
Right-of-use assets      
Reconciliation of changes in property, plant and equipment [abstract]      
Property, plant and equipment including right-of-use assets at beginning of period 2,390 3,049  
Acquisitions 503 37  
Disposals (12) (18)  
Depreciation (684) (693)  
Transfers 0 0  
Foreign exchange variation (13) 14  
Property, plant and equipment including right-of-use assets at end of period 2,183 2,390 3,049
Land and buildings      
Reconciliation of changes in property, plant and equipment [abstract]      
Property, plant and equipment including right-of-use assets at beginning of period 2,285 2,958 4,242
Acquisitions 286 21 101
Disposals 0 0 (516)
Depreciation (587) (549) (860)
Transfers 0 (159) (10)
Foreign exchange variation (13) 14  
Property, plant and equipment including right-of-use assets at end of period 1,971 2,285 2,958
Land and buildings | Right-of-use assets      
Reconciliation of changes in property, plant and equipment [abstract]      
Property, plant and equipment including right-of-use assets at beginning of period 1,269 1,675  
Acquisitions 285 0  
Disposals 0 0  
Depreciation (459) (420)  
Transfers 0 0  
Foreign exchange variation (13) 14  
Property, plant and equipment including right-of-use assets at end of period 1,083 1,269 1,675
Laboratory equipment and other      
Reconciliation of changes in property, plant and equipment [abstract]      
Property, plant and equipment including right-of-use assets at beginning of period 2,861 3,377 4,298
Acquisitions 358 370 250
Disposals (23) (19) (92)
Depreciation (797) (1,027) (1,089)
Transfers 0 159 10
Foreign exchange variation 0 1  
Property, plant and equipment including right-of-use assets at end of period 2,385 2,861 3,377
Laboratory equipment and other | Right-of-use assets      
Reconciliation of changes in property, plant and equipment [abstract]      
Property, plant and equipment including right-of-use assets at beginning of period 1,121 1,374  
Acquisitions 218 37  
Disposals (12) (18)  
Depreciation (225) (272)  
Transfers 0 0  
Foreign exchange variation 0 0  
Property, plant and equipment including right-of-use assets at end of period 1,101 1,121 1,374
In progress      
Reconciliation of changes in property, plant and equipment [abstract]      
Property, plant and equipment including right-of-use assets at beginning of period 0 0 0
Acquisitions 0 0 0
Disposals 0 0 0
Depreciation 0 0 0
Transfers 0 0 0
Foreign exchange variation 0 0  
Property, plant and equipment including right-of-use assets at end of period 0 0 0
In progress | Right-of-use assets      
Reconciliation of changes in property, plant and equipment [abstract]      
Property, plant and equipment including right-of-use assets at beginning of period 0 0  
Acquisitions 0 0  
Disposals 0 0  
Depreciation 0 0  
Transfers 0 0  
Foreign exchange variation 0 0  
Property, plant and equipment including right-of-use assets at end of period € 0 € 0 € 0