Summary of material accounting policies - Employee Benefits (Details) - employee |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure Of Detailed Information About Employee Benefits [Line Items] | ||
| Percentage of VSAO contributions in total company's defined benefit plans | 90.00% | |
| VSAO | ||
| Disclosure Of Detailed Information About Employee Benefits [Line Items] | ||
| Defined benefit plan, employer contribution | 60.00% | |
| Defined benefit plan, employee contribution | 40.00% | |
| Voluntary complementary plan | ||
| Disclosure Of Detailed Information About Employee Benefits [Line Items] | ||
| Defined benefit plan, employer contribution | 70.00% | |
| Defined benefit plan, employee contribution | 30.00% | |
| Number of employees that participated | 29 | 33 |
| Number of eligible employees | 29 | 33 |