Prepayments and other current assets - Additional Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Prepayments and other current assets | |||
| Allowance for prepayments and other current assets | $ 0 | $ 0 | $ 0 |