v3.26.1
Expenses by nature - Schedule of principal accountant fees and services (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
PricewaterhouseCoopers      
Disclosure of attribution of expenses by nature to their function [line items]      
Audit fees € 1,182 € 1,710 € 2,076
Audit fees, percentage 74.00% 89.00% 98.00%
Audit-related Fees € 0 € 0 € 0
Audit-related fees, percentage
Tax Services € 122 € 45 € 40
Tax fees, percentage 8.00% 2.00% 2.00%
All Other Fees € 292 € 163 € 0
All Other Fees, percentage 18.00% 8.00%
Auditor's remuneration € 1,596 € 1,918 € 2,116
Auditor's remuneration, percentage 100.00% 100.00% 100.00%
Deloitte & Associés      
Disclosure of attribution of expenses by nature to their function [line items]      
Audit fees € 1,029 € 1,311 € 1,902
Audit fees, percentage 100.00% 89.00% 99.00%
Audit-related Fees € 0 € 0 € 0
Audit-related fees, percentage
Tax Services € 0 € 0 € 0
Tax fees, percentage
All Other Fees € 0 € 163 € 19
All Other Fees, percentage 11.00% 1.00%
Auditor's remuneration € 1,029 € 1,474 € 1,921
Auditor's remuneration, percentage 100.00% 100.00% 100.00%
Statutory auditor | PricewaterhouseCoopers      
Disclosure of attribution of expenses by nature to their function [line items]      
Audit fees € 1,082 € 1,272 € 1,539
Audit fees, percentage 68.00% 66.00% 73.00%
Audit-related Fees € 0 € 0 € 0
Audit-related fees, percentage
Statutory auditor | Deloitte & Associés      
Disclosure of attribution of expenses by nature to their function [line items]      
Audit fees € 939 € 1,185 € 1,622
Audit fees, percentage 91.00% 80.00% 84.00%
Audit-related Fees € 0 € 0 € 0
Audit-related fees, percentage
Statutory auditor's network | PricewaterhouseCoopers      
Disclosure of attribution of expenses by nature to their function [line items]      
Audit fees € 100 € 439 € 537
Audit fees, percentage 6.00% 23.00% 25.00%
Audit-related Fees € 0 € 0 € 0
Audit-related fees, percentage
Tax Services € 122 € 45 € 40
Tax fees, percentage 8.00% 2.00% 2.00%
Statutory auditor's network | Deloitte & Associés      
Disclosure of attribution of expenses by nature to their function [line items]      
Audit fees € 90 € 126 € 280
Audit fees, percentage 9.00% 9.00% 15.00%
Audit-related Fees € 0 € 0 € 0
Audit-related fees, percentage
Tax Services € 0 € 0 € 0
Tax fees, percentage