v3.26.1
Property, plant and equipment - Right of Use (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 € 17,499  
On December 31, 8,717 € 17,499
RIGHT OF USE    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 17,499  
On December 31, 8,717 17,499
Acquisition value    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 32,661 31,078
Additions 2,707 8,823
Sales and disposals (17,444) (7,353)
Translation differences (549) 113
On December 31, 17,375 32,661
Depreciations and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 (15,161) (15,976)
Depreciation (3,917) (4,558)
Impairment (3,655)  
Sales and disposals 13,846 5,370
Translation differences 229 3
On December 31, (8,658) (15,161)
Land and building | RIGHT OF USE    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 12,381  
On December 31, 7,190 12,381
Land and building | Acquisition value    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 24,585 23,174
Additions 2,181 4,287
Sales and disposals (12,023) (2,989)
Translation differences (549) 113
On December 31, 14,194 24,585
Land and building | Depreciations and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 (12,204) (11,279)
Depreciation (2,185) (2,848)
Sales and disposals 10,811 1,920
Translation differences 229 3
On December 31, (7,004) (12,204)
Installation and machinery | RIGHT OF USE    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 1,567  
On December 31, 872 1,567
Installation and machinery | Acquisition value    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 1,658 251
Additions   1,657
Sales and disposals (459) (250)
On December 31, 1,199 1,658
Installation and machinery | Depreciations and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 (91) (223)
Depreciation (381) (118)
Sales and disposals 145 250
On December 31, (327) (91)
Furniture, fixtures & vehicles | RIGHT OF USE    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 3,552  
On December 31, 655 3,552
Furniture, fixtures & vehicles | Acquisition value    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 6,417 7,652
Additions 526 2,879
Sales and disposals (4,962) (4,114)
On December 31, 1,981 6,417
Furniture, fixtures & vehicles | Depreciations and impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
On January 1 (2,865) (4,473)
Depreciation (1,351) (1,592)
Sales and disposals 2,890 3,200
On December 31, € (1,326) € (2,865)