v3.24.1.u1
REDEEMABLE CONVERTIBLE PREFERRED SHARES - Activities (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Company's activities with respect to the redeemable convertible preferred shares      
Beginning balance   $ 368,409  
Beginning balance (in shares)   68,228,526  
Issuance of preferred shares     $ 343,849
Issuance of preferred shares (in shares)     62,895,699
Re-designation of ordinary share into preferred shares     $ 23,650
Re-designation of ordinary share into preferred shares (in shares)     5,332,827
Accretion of redeemable convertible preferred shares   $ 15,121 $ 910
Ending balance $ 368,409 $ 383,530 $ 368,409
Ending balance (in shares) 68,228,526 68,228,526 68,228,526
Series Pre-A Preferred Shares      
Company's activities with respect to the redeemable convertible preferred shares      
Beginning balance   $ 177,284  
Beginning balance (in shares)   40,885,006  
Issuance of preferred shares     $ 153,126
Issuance of preferred shares (in shares)     35,552,179
Re-designation of ordinary share into preferred shares     $ 23,650
Re-designation of ordinary share into preferred shares (in shares)     5,332,827
Accretion of redeemable convertible preferred shares   $ 7,225 $ 508
Ending balance $ 177,284 $ 184,509 $ 177,284
Ending balance (in shares) 40,885,006 40,885,006 40,885,006
Series A Preferred Shares Preferred Shares      
Company's activities with respect to the redeemable convertible preferred shares      
Beginning balance   $ 191,125  
Beginning balance (in shares)   27,343,520  
Issuance of preferred shares     $ 190,723
Issuance of preferred shares (in shares) 27,343,520   27,343,520
Accretion of redeemable convertible preferred shares   $ 7,896 $ 402
Ending balance $ 191,125 $ 199,021 $ 191,125
Ending balance (in shares) 27,343,520 27,343,520 27,343,520