v3.26.1
Ordinary Shares - Activities of the Group's Class A ordinary shares and Class B ordinary shares (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 27, 2025
Dec. 15, 2023
Mar. 28, 2023
Oct. 18, 2021
Sep. 13, 2021
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Nov. 01, 2022
Dec. 31, 2020
Dec. 31, 2019
Aug. 28, 2014
Ordinary Shares                        
Beginning Balance           $ 1,007,448 $ 970,565 $ 962,167        
Cancellation of Treasury (in shares) (223,773) (1,200,794) (2,753,167)                  
Ending Balance           $ 1,022,605 $ 1,007,448 $ 970,565        
Ordinary shares, par value           $ 0.00005 $ 0.00005 $ 0.00005   $ 0.00005 $ 0.00005 $ 0.00005
Common Stock                        
Ordinary Shares                        
Beginning Balance (in shares)           574,592,599 574,592,599 578,546,560        
Beginning Balance           $ 29 $ 29 $ 29        
Cancellation of Treasury (in shares)           (223,773)   (3,953,961)        
Number of shares issued during the period           37,159,350            
Stock Issued During Period, Value, New Issues           $ 2            
Ending Balance (in shares)           611,528,176 574,592,599 574,592,599        
Ending Balance           $ 31 $ 29 $ 29        
Common Class A                        
Ordinary Shares                        
Number of shares issued during the period       5,000,000 5,000,000 37,159,350            
Ordinary shares, par value           $ 0.00005 $ 0.00005   $ 0.00005      
Common Class A | Common Stock                        
Ordinary Shares                        
Beginning Balance (in shares)           504,387,299 504,387,299          
Beginning Balance           $ 25 $ 25          
Cancellation of Treasury (in shares)           223,773            
Conversion of Class B ordinary shares to Class A ordinary shares           42,047            
Number of shares issued during the period           37,159,350            
Stock Issued During Period, Value, New Issues           $ 2            
Ending Balance (in shares)           541,364,923 504,387,299 504,387,299        
Ending Balance           $ 27 $ 25 $ 25        
Common Class B                        
Ordinary Shares                        
Ordinary shares, par value           $ 0.00005 $ 0.00005          
Common Class B | Common Stock                        
Ordinary Shares                        
Beginning Balance (in shares)           70,205,300 70,205,300          
Beginning Balance           $ 4 $ 4          
Cancellation of Treasury (in shares)           0 0          
Conversion of Class B ordinary shares to Class A ordinary shares           (42,047) 0          
Number of shares issued during the period           0            
Ending Balance (in shares)           70,163,253 70,205,300 70,205,300        
Ending Balance           $ 4 $ 4 $ 4        
Class A ordinary shares and Class B ordinary shares | Common Stock                        
Ordinary Shares                        
Beginning Balance (in shares)           574,592,599 574,592,599          
Beginning Balance           $ 29 $ 29          
Cancellation of Treasury (in shares)           223,773            
Number of shares issued during the period           37,159,350            
Stock Issued During Period, Value, New Issues           $ 2            
Ending Balance (in shares)           611,528,176 574,592,599 574,592,599        
Ending Balance           $ 31 $ 29 $ 29