Convertible Redeemable Preferred Shares (Tables)
 12 Months Ended
Dec. 31, 2021
Temporary Equity Disclosure [Abstract]  
Schedule of Preferred Shares Activity
 
The Company’s Preferred Shares activities for the years ended December 31, 2020 and 2021 are summarized in the following table:
 
   
Series A Preferred Shares
    
Series B Preferred Shares
    
Series B+ Preferred Shares
    
Series C Preferred Shares
    
Series C+ Preferred Shares
    
Total
  
   
Number of
shares
    
Amount
(US$ thousand)
    
Number of
shares
    
Amount
(US$ thousand)
    
Number of
shares
    
Amount
(US$ thousand)
    
Number of
shares
    
Amount
(US$ thousand)
    
Number of
shares
    
Amount
(US$ thousand)
    
Amount
(US$ thousand)
  
Balances as of January 1, 2020
     55,626,960     $ 90,050       50,783,698     $ 30,046       26,651,410     $ 46,274       34,793,413     $ 73,600       —       $ —       $ 239,970  
   
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Issuance of convertible redeemable preferred shares, net of issuance costs
     —         —         —         —         —         —         —         —         15,062,510       50,000       50,000  
Accretion on convertible redeemable preferred shares to redemption value
     —         188,085       —         45       —         197       —         3,006       —         2,133       193,466  
Conversion of convertible redeemable preferred shares upon completion of the IPO
     (55,626,960 )      (278,135 )      (50,783,698 )      (30,091 )      (26,651,410 )      (46,471 )      (34,793,413 )      (76,606 )      (15,062,510 )      (52,133 )      (483,436 ) 
   
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Balances as of December 31, 2020 and 2021
     —       $ —         —       $ —         —       $ —         —       $ —         —       $ —       $ —