v3.26.1
Deferred tax - Changes in deferred taxes (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Deferred tax liabilities    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
On January 1 € (20,660) € (23,607)
Credited/charged (-) to profit or loss 20,612 2,977
Exchange differences 48 (30)
On December 31   (20,660)
Intangible assets other than goodwill | Deferred tax liabilities    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
On January 1 (19,312) (21,588)
Credited/charged (-) to profit or loss 19,264 2,306
Exchange differences 48 (30)
On December 31   (19,312)
Retirement benefit liabilities | Deferred tax assets    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
On January 1 253 159
Credited/charged (-) to profit or loss (240) (82)
Charged to other comprehensive income (13) 177
Exchange differences   (1)
On December 31   253
Tax loss carryforward | Deferred tax assets    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
On January 1 329 292
Credited/charged (-) to profit or loss (302) 18
Exchange differences (27) 19
On December 31   329
Property, plant and equipment | Deferred tax assets    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
On January 1 892 675
Credited/charged (-) to profit or loss (657) 190
Exchange differences (40) 27
On December 31 195 892
Other | Deferred tax assets    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
On January 1 1,474 1,126
Credited/charged (-) to profit or loss (1,199) 126
Charged to other comprehensive income (13) 177
Exchange differences (67) 45
On December 31 195 1,474
Other | Deferred tax liabilities    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
On January 1 (1,348) (2,019)
Credited/charged (-) to profit or loss € 1,348 671
On December 31   € (1,348)