Others - Financial instruments, schedule of contractual undiscounted cash flows of non-derivative financial liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Less than 1 year \| Financial liabilities at fair value through profit or loss
Financial instruments
Non-derivative financial liabilities	$ 0	$ 0
Less than 1 year \| Other payables (including related parties)
Financial instruments
Non-derivative financial liabilities	12,903	11,702
Less than 1 year \| Lease liabilities (including current portion)
Financial instruments
Non-derivative financial liabilities	456	409
Between 1-5 years \| Financial liabilities at fair value through profit or loss
Financial instruments
Non-derivative financial liabilities	419	1,793
Between 1-5 years \| Other payables (including related parties)
Financial instruments
Non-derivative financial liabilities	0	0
Between 1-5 years \| Lease liabilities (including current portion)
Financial instruments
Non-derivative financial liabilities	240	109
Over 5 years \| Financial liabilities at fair value through profit or loss
Financial instruments
Non-derivative financial liabilities	0	0
Over 5 years \| Other payables (including related parties)
Financial instruments
Non-derivative financial liabilities	0	0
Over 5 years \| Lease liabilities (including current portion)
Financial instruments
Non-derivative financial liabilities	$ 0	$ 0