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CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE CONVERTIBLE PREFERRED STOCK AND SHAREHOLDERS’ EQUITY (DEFICIT) - USD ($)
Total
Common Stock Outstanding
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Income
Beginning balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2019 23,695,330        
Beginning balance, temporary equity at Dec. 31, 2019 $ 347,938,000        
Increase (Decrease) in Temporary Equity [Roll Forward]          
Issuance of preferred stock (in shares) 2,034,212        
Issuance of preferred stock $ 46,470,000        
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2020 25,729,542        
Ending balance, temporary equity at Dec. 31, 2020 $ 394,408,000        
Increase (Decrease) in Temporary Equity [Roll Forward]          
Stock issuance cost 30,000        
Beginning balance, Common stock, shares outstanding (in shares) at Dec. 31, 2019   1,622,886      
Balance at the beginning at Dec. 31, 2019 (276,592,000) $ 0 $ 16,354,000 $ (295,487,000) $ 2,541,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Share-based compensation expense 2,392,000   2,392,000    
Net loss (37,713,000)     (37,713,000)  
Issuance of common stock upon exercise of options (in shares)   33,529      
Issuance of common stock upon exercise of options 72,000   72,000    
Foreign currency translation adjustments $ 625,000       625,000
Ending balance, Common stock, shares outstanding (in shares) at Dec. 31, 2020 1,656,415 1,656,415      
Balance at the end at Dec. 31, 2020 $ (311,216,000) $ 0 18,818,000 (333,200,000) 3,166,000
Increase (Decrease) in Temporary Equity [Roll Forward]          
Issuance of preferred stock (in shares) 3,634,210        
Issuance of preferred stock $ 83,073,000        
Exercise of warrants (in shares) 158,058        
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Sep. 30, 2021 29,521,810        
Ending balance, temporary equity at Sep. 30, 2021 $ 480,631,000        
Increase (Decrease) in Temporary Equity [Roll Forward]          
Stock issuance cost 0        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Share-based compensation expense 1,790,000   1,790,000    
Repurchase of equity instruments (396,000)   (396,000)    
Net loss (30,591,000)     (30,591,000)  
Issuance of common stock upon exercise of options (in shares)   448,019      
Issuance of common stock upon exercise of options 702,000   702,000    
Ending balance, Common stock, shares outstanding (in shares) at Sep. 30, 2021   2,104,434      
Balance at the end at Sep. 30, 2021 $ (339,740,000) $ 0 20,914,000 (363,791,000) 3,137,000
Beginning balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2020 25,729,542        
Beginning balance, temporary equity at Dec. 31, 2020 $ 394,408,000        
Increase (Decrease) in Temporary Equity [Roll Forward]          
Issuance of preferred stock (in shares) 3,792,268        
Issuance of preferred stock $ 86,223,000        
Exercise of warrants $ 3,150,000        
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2021 29,521,810        
Ending balance, temporary equity at Dec. 31, 2021 $ 480,631,000        
Increase (Decrease) in Temporary Equity [Roll Forward]          
Stock issuance cost $ 0        
Beginning balance, Common stock, shares outstanding (in shares) at Dec. 31, 2020 1,656,415 1,656,415      
Balance at the beginning at Dec. 31, 2020 $ (311,216,000) $ 0 18,818,000 (333,200,000) 3,166,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Share-based compensation expense 2,531,000   2,531,000    
Repurchase of equity instruments (396,000)   (396,000)    
Net loss $ (46,689,000)     (46,689,000)  
Issuance of common stock upon exercise of options (in shares) 620,000 450,519      
Issuance of common stock upon exercise of options $ 758,000   758,000    
Foreign currency translation adjustments $ 95,000       95,000
Ending balance, Common stock, shares outstanding (in shares) at Dec. 31, 2021 2,106,934 2,106,934      
Balance at the end at Dec. 31, 2021 $ (354,917,000) $ 0 21,711,000 (379,889,000) 3,261,000
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Sep. 30, 2021 29,521,810        
Ending balance, temporary equity at Sep. 30, 2021 $ 480,631,000        
Ending balance, Common stock, shares outstanding (in shares) at Sep. 30, 2021   2,104,434      
Balance at the end at Sep. 30, 2021 $ (339,740,000) $ 0 20,914,000 (363,791,000) 3,137,000
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2021 29,521,810        
Ending balance, temporary equity at Dec. 31, 2021 $ 480,631,000        
Ending balance, Common stock, shares outstanding (in shares) at Dec. 31, 2021 2,106,934 2,106,934      
Balance at the end at Dec. 31, 2021 $ (354,917,000) $ 0 21,711,000 (379,889,000) 3,261,000
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Sep. 30, 2021 29,521,810        
Ending balance, temporary equity at Sep. 30, 2021 $ 480,631,000        
Ending balance, Common stock, shares outstanding (in shares) at Sep. 30, 2021   2,104,434      
Balance at the end at Sep. 30, 2021 $ (339,740,000) $ 0 20,914,000 (363,791,000) 3,137,000
Beginning balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2021 29,521,810        
Beginning balance, temporary equity at Dec. 31, 2021 $ 480,631,000        
Beginning balance, Common stock, shares outstanding (in shares) at Dec. 31, 2021 2,106,934 2,106,934      
Balance at the beginning at Dec. 31, 2021 $ (354,917,000) $ 0 21,711,000 (379,889,000) 3,261,000
Beginning balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2021 29,521,810        
Beginning balance, temporary equity at Dec. 31, 2021 $ 480,631,000        
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Sep. 30, 2022 29,521,810        
Ending balance, temporary equity at Sep. 30, 2022 $ 480,631,000        
Beginning balance, Common stock, shares outstanding (in shares) at Dec. 31, 2021 2,106,934 2,106,934      
Balance at the beginning at Dec. 31, 2021 $ (354,917,000) $ 0 21,711,000 (379,889,000) 3,261,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Share-based compensation expense 2,067,000   2,067,000    
Net loss $ (54,974,000)     (54,974,000)  
Issuance of common stock upon exercise of options (in shares) 3,000 3,412      
Issuance of common stock upon exercise of options $ 23,000   23,000    
Ending balance, Common stock, shares outstanding (in shares) at Sep. 30, 2022 2,110,346 2,110,346      
Balance at the end at Sep. 30, 2022 $ (407,640,000) $ 0 23,801,000 (434,863,000) 3,422,000
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Sep. 30, 2022 29,521,810        
Ending balance, temporary equity at Sep. 30, 2022 $ 480,631,000        
Ending balance, Common stock, shares outstanding (in shares) at Sep. 30, 2022 2,110,346 2,110,346      
Balance at the end at Sep. 30, 2022 $ (407,640,000) $ 0 $ 23,801,000 $ (434,863,000) $ 3,422,000