Short-term loans (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Short-term loans
Short-term loans	$ 10,672	$ 34,853

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Name:	us-gaap_ShortTermBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant