XML 122 R59.htm IDEA: XBRL DOCUMENT v3.25.1
Property, plant and equipment - Additional Information (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Right of use – Buildings | Gross book value of tangible assets    
Disclosure of detailed information about property, plant and equipment [line items]    
Increase in right-of-use assets € 228 € 337
Transfer 0 0
Right of use – Buildings | Gross book value of tangible assets | Wattignies    
Disclosure of detailed information about property, plant and equipment [line items]    
Increase in right-of-use assets 100 200
Right of use – Buildings | Gross book value of tangible assets | Waccano    
Disclosure of detailed information about property, plant and equipment [line items]    
Increase in right-of-use assets € 100 100
Right of use – Buildings | Bottom of Range    
Disclosure of detailed information about property, plant and equipment [line items]    
Depreciation periods of property, plant and equipment 5 years  
Right of use – Buildings | Top of Range    
Disclosure of detailed information about property, plant and equipment [line items]    
Depreciation periods of property, plant and equipment 10 years  
Technical equipment | Gross book value of tangible assets    
Disclosure of detailed information about property, plant and equipment [line items]    
Increase in right-of-use assets € 166 113
Transfer € 0 300
Technical equipment | Bottom of Range    
Disclosure of detailed information about property, plant and equipment [line items]    
Depreciation periods of property, plant and equipment 3 years  
Technical equipment | Top of Range    
Disclosure of detailed information about property, plant and equipment [line items]    
Depreciation periods of property, plant and equipment 10 years  
Office and IT equipment | Gross book value of tangible assets    
Disclosure of detailed information about property, plant and equipment [line items]    
Increase in right-of-use assets € 227 41
Transfer € (15) 0
Office and IT equipment | Bottom of Range    
Disclosure of detailed information about property, plant and equipment [line items]    
Depreciation periods of property, plant and equipment 1 year  
Office and IT equipment | Top of Range    
Disclosure of detailed information about property, plant and equipment [line items]    
Depreciation periods of property, plant and equipment 10 years  
Fixtures, fittings and installations | Gross book value of tangible assets    
Disclosure of detailed information about property, plant and equipment [line items]    
Increase in right-of-use assets € 48 2
Transfer € 22 0
Fixtures, fittings and installations | Bottom of Range    
Disclosure of detailed information about property, plant and equipment [line items]    
Depreciation periods of property, plant and equipment 5 years  
Fixtures, fittings and installations | Top of Range    
Disclosure of detailed information about property, plant and equipment [line items]    
Depreciation periods of property, plant and equipment 10 years  
Transfer € 0 0
Gross book value of tangible assets    
Disclosure of detailed information about property, plant and equipment [line items]    
Increase in right-of-use assets 903 638
Transfer € (25) € 0