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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS    
Net cash generated from/(used in) operating activities $ 12,223 $ (72,894)
Investing activities    
Purchases of property, plant and equipment (5,630) (9,267)
Proceeds from disposal of property, plant and equipment 5 6
Deposits in short-term investments (1,268,260) (1,301,767)
Proceeds from short-term investments 1,295,945 730,118
Proceeds from divestment of an equity investee   608,503
Acquisition of an intangible asset   (10,000)
Net cash generated from investing activities 22,060 17,593
Financing activities    
Proceeds from issuances of ordinary shares 19 1,100
Proceeds from bank borrowings 2,972 8,221
Repayments of bank borrowings (5,847)  
Net cash (used in)/generated from financing activities (2,856) 9,321
Net increase/(decrease) in cash and cash equivalents 31,427 (45,980)
Effect of exchange rate changes on cash and cash equivalents 3,800 2,741
Net increase/(decrease) in cash and cash equivalents, including effect of exchange rate changes 35,227 (43,239)
Cash and cash equivalents    
Cash and cash equivalents at beginning of period 71,330 153,958
Cash and cash equivalents at end of period $ 106,557 $ 110,719