v3.26.1
Long-term investments, net - Equity securities (Details)
$ / shares in Units, ¥ in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Dec. 23, 2025
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
May 31, 2022
USD ($)
day
$ / shares
shares
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2025
CNY (¥)
Long-term investments            
Other commitment   $ 6,000   $ 6,000    
Equity securities   17,507   17,507 $ 728  
Luminar Technologies, Inc            
Long-term investments            
Equity securities (in shares) | shares     2,030,374      
Equity securities   $ 11,000 $ 12,588 11,000 728  
Equity securities, annual amount       $ 717 $ 6,114  
Lotus Technology Inc | Tech Lent Dream Smart            
Long-term investments            
Equity interest (as a percent)   100.00%   100.00%   100.00%
Luminar Technologies, Inc            
Long-term investments            
Other commitment     $ 15,000      
Trading days | day     20      
Ordinary shares, par value per share (in USD per share) | $ / shares     $ 0.0001      
Lotus Technology Inc            
Long-term investments            
Number of shares issued in transaction (in shares) | shares 16,788,321          
Share price (in USD per share) | $ / shares $ 1.37          
Consideration received $ 23,000          
Gain on sale of forward contract $ 496          
Remaining shares outstanding (in shares) | shares 4,379,562          
Derivative asset fair value $ 175          
Unrealized loss       $ 143    
Lotus Technology Inc | Tech Lent Dream Smart            
Long-term investments            
Aggregate principal amount   $ 42,979   $ 42,979   ¥ 300,000
Debt instrument term   36 months        
Lotus Technology Inc | Sale of Stock, Tranche One            
Long-term investments            
Number of shares issued in transaction (in shares) | shares 12,408,759          
Consideration received $ 17,000