Employee pension - Additional Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Employee pension | |||
| Percentage of monthly contributions made by the company to the state retirement plan | 20.00% | ||
| Percentage of monthly salaries for all Hong Kong based employees to mandatory provident fund Schemes | 5.00% | ||
| Percentage of monthly salaries for all Australia based employees to Superannuation Schemes | 9.50% | ||
| Pension expense | $ 47 | $ 23 | $ 22 |