v3.25.4
Property, Plant and Equipment (Details) - EUR (€)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Property, Plant and Equipment    
Carrying amount at beginning of period € 14,113,000 € 16,897,000
Additions 857,000 1,203,000
Depreciation (2,703,000) (2,761,000)
Effect of lease modification 363,000 (1,226,000)
Movement for the period (1,483,000) (2,784,000)
Carrying amount at end of period 12,630,000 14,113,000
Research and development costs    
Property, Plant and Equipment    
Depreciation (2,342,000) (2,331,000)
General and administrative costs    
Property, Plant and Equipment    
Depreciation (361,000) (430,000)
Buildings and Leasehold improvements    
Property, Plant and Equipment    
Carrying amount at beginning of period 11,746,000 14,755,000
Additions 35,000 244,000
Depreciation (1,925,000) (2,027,000)
Effect of lease modification 363,000 (1,226,000)
Movement for the period (1,527,000) (3,009,000)
Carrying amount at end of period 10,219,000 11,746,000
Right-of-use assets 9,994,000 11,433,000
Laboratory equipment    
Property, Plant and Equipment    
Carrying amount at beginning of period 2,287,000 2,081,000
Additions 709,000 916,000
Depreciation (746,000) (710,000)
Movement for the period (37,000) 206,000
Carrying amount at end of period 2,250,000 2,287,000
Other    
Property, Plant and Equipment    
Carrying amount at beginning of period 80,000 61,000
Additions 113,000 43,000
Depreciation (32,000) (24,000)
Movement for the period 81,000 19,000
Carrying amount at end of period 161,000 80,000
Cost    
Property, Plant and Equipment    
Carrying amount at beginning of period 32,069,000 32,092,000
Carrying amount at end of period 33,289,000 32,069,000
Cost | Buildings and Leasehold improvements    
Property, Plant and Equipment    
Carrying amount at beginning of period 23,793,000 24,775,000
Carrying amount at end of period 24,191,000 23,793,000
Cost | Laboratory equipment    
Property, Plant and Equipment    
Carrying amount at beginning of period 6,824,000 5,908,000
Carrying amount at end of period 7,533,000 6,824,000
Cost | Other    
Property, Plant and Equipment    
Carrying amount at beginning of period 1,452,000 1,409,000
Carrying amount at end of period 1,565,000 1,452,000
Accumulated depreciation    
Property, Plant and Equipment    
Carrying amount at beginning of period (17,956,000) (15,195,000)
Carrying amount at end of period (20,659,000) (17,956,000)
Accumulated depreciation | Buildings and Leasehold improvements    
Property, Plant and Equipment    
Carrying amount at beginning of period (12,047,000) (10,020,000)
Carrying amount at end of period (13,972,000) (12,047,000)
Accumulated depreciation | Laboratory equipment    
Property, Plant and Equipment    
Carrying amount at beginning of period (4,537,000) (3,827,000)
Carrying amount at end of period (5,283,000) (4,537,000)
Accumulated depreciation | Other    
Property, Plant and Equipment    
Carrying amount at beginning of period (1,372,000) (1,348,000)
Carrying amount at end of period € (1,404,000) € (1,372,000)