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Preferred Shares (Details) - Schedule of balance of Series Preferred and redeemable noncontrolling interests - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Series A1/C1 Preferred [Member]          
Redeemable Noncontrolling Interest [Line Items]          
Beginning balance $ 80,581 $ 76,684 $ 76,684 $ 76,864 $ 66,839
Accretion before the extinguishment       961  
Conversion from Series A1 to C2 Preferred       (11,417)  
Fair value change of preferred shares and redeemable noncontrolling interests due to the extinguishment       7,135  
Accretion after the extinguishment       3,141  
Accretion     3,897    
Reclassification from noncontrolling interests        
Accretion before the fair value change        
Fair value change of redeemable noncontrolling interests due to extinguishment        
Accretion after the fair value change         10,025
Ending balance     80,581 76,684 76,864
Series B1/C2 Preferred [Member]          
Redeemable Noncontrolling Interest [Line Items]          
Beginning balance 81,966 73,100 73,100 65,881 57,490
Accretion before the extinguishment       804  
Conversion from Series A1 to C2 Preferred       11,417  
Fair value change of preferred shares and redeemable noncontrolling interests due to the extinguishment       (12,146)  
Accretion after the extinguishment       7,144  
Accretion     8,866    
Reclassification from noncontrolling interests        
Accretion before the fair value change        
Fair value change of redeemable noncontrolling interests due to extinguishment        
Accretion after the fair value change         8,391
Ending balance     81,966 73,100 65,881
Series EEL/D1 Preferred [Member]          
Redeemable Noncontrolling Interest [Line Items]          
Beginning balance 146,583 127,935 127,935 153,223 140,000
Accretion before the extinguishment       15,439  
Conversion from Series A1 to C2 Preferred        
Fair value change of preferred shares and redeemable noncontrolling interests due to the extinguishment       (56,127)  
Accretion after the extinguishment       15,400  
Accretion     18,648    
Reclassification from noncontrolling interests        
Accretion before the fair value change        
Fair value change of redeemable noncontrolling interests due to extinguishment        
Accretion after the fair value change         13,223
Ending balance     146,583 127,935 153,223
Redeemable noncontrolling interests [Member]          
Redeemable Noncontrolling Interest [Line Items]          
Beginning balance 90,820 80,561 80,561 79,615
Accretion before the extinguishment       796  
Conversion from Series A1 to C2 Preferred        
Fair value change of preferred shares and redeemable noncontrolling interests due to the extinguishment       (8,299)  
Accretion after the extinguishment       8,449  
Accretion 5,841 7,681 10,259    
Reclassification from noncontrolling interests         81,438
Accretion before the fair value change         2,505
Fair value change of redeemable noncontrolling interests due to extinguishment         (5,828)
Accretion after the fair value change         1,500
Ending balance $ 88,242 $ 90,820 $ 80,561 $ 79,615