v3.26.1
Income taxes - Income tax expense recognized in the consolidated statements of comprehensive loss (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Line Items]      
Total current income tax benefit (expense) $ (1,694) $ (2,741) $ 509
Total deferred income tax benefit 450 2,531 [1] 16 [1]
Income tax benefit (expense) (1,244) (210) [2] 525 [2]
Chinese mainland      
Income Tax Disclosure [Line Items]      
Total current income tax benefit (expense) (168) (1,242) 1,060
Total deferred income tax benefit 464 2,539 0
Others      
Income Tax Disclosure [Line Items]      
Total current income tax benefit (expense) (1,526) (1,499) (551)
Total deferred income tax benefit $ (14) $ (8) $ 16
[1] Restated (refer to Note 2(c))
[2] Restated (refer to Note 2(c))