v3.26.1
Property, plant and equipment - Schedule of reconciliation of property, plant and equipment (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance € 138,883 € 136,198
Additions 2,232 14,421
Depreciation charge (16,927) (14,705)
Impairment charge/reversal 1,258 322
Disposals (2,711) (932)
Exchange rate differences (3,262) 3,579
Property, plant and equipment, ending balance 119,474 138,883
Cost    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 234,051  
Property, plant and equipment, ending balance 229,365 234,051
Accumulated depreciation and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance (95,167)  
Property, plant and equipment, ending balance (109,891) (95,167)
Land, buildings and leasehold improvements    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 104,678 99,100
Additions 1,897 10,356
Depreciation charge (9,736) (7,828)
Impairment charge/reversal 1,904 0
Disposals (2,077) (102)
Exchange rate differences (3,296) 3,151
Property, plant and equipment, ending balance 93,369 104,678
Land, buildings and leasehold improvements | Cost    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 151,034  
Property, plant and equipment, ending balance 147,409 151,034
Land, buildings and leasehold improvements | Accumulated depreciation and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance (46,357)  
Property, plant and equipment, ending balance (54,040) (46,357)
Manufacturing and laboratory equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 29,056 31,761
Additions 2,489 3,720
Depreciation charge (6,548) (6,248)
Impairment charge/reversal (629) 322
Disposals (611) (800)
Exchange rate differences 22 302
Property, plant and equipment, ending balance 23,778 29,056
Manufacturing and laboratory equipment | Cost    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 74,445  
Property, plant and equipment, ending balance 75,889 74,445
Manufacturing and laboratory equipment | Accumulated depreciation and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance (45,389)  
Property, plant and equipment, ending balance (52,111) (45,389)
Computer hardware    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 1,155 1,053
Additions 317 569
Depreciation charge (477) (467)
Impairment charge/reversal 0 0
Disposals (19) (20)
Exchange rate differences (10) 20
Property, plant and equipment, ending balance 966 1,155
Computer hardware | Cost    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 3,542  
Property, plant and equipment, ending balance 3,570 3,542
Computer hardware | Accumulated depreciation and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance (2,386)  
Property, plant and equipment, ending balance (2,604) (2,386)
Furniture, fittings and other    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 477 560
Additions 56 68
Depreciation charge (166) (161)
Impairment charge/reversal (16) 0
Disposals (4) (11)
Exchange rate differences (19) 21
Property, plant and equipment, ending balance 328 477
Furniture, fittings and other | Cost    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 1,512  
Property, plant and equipment, ending balance 1,465 1,512
Furniture, fittings and other | Accumulated depreciation and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance (1,035)  
Property, plant and equipment, ending balance (1,137) (1,035)
Assets in the course of construction    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 3,518 3,724
Additions (2,526) (292)
Depreciation charge 0 0
Impairment charge/reversal 0 0
Disposals 0 0
Exchange rate differences 41 86
Property, plant and equipment, ending balance 1,032 3,518
Assets in the course of construction | Cost    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 3,518  
Property, plant and equipment, ending balance 1,032 3,518
Assets in the course of construction | Accumulated depreciation and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, beginning balance 0  
Property, plant and equipment, ending balance € 0 € 0