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Consolidated Statements of Redeemable Converted Preferred Stock and Stockholders’ Equity (Deficit) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Temporary equity, beginning balance (in shares) at Dec. 31, 2018 97,420,191        
Temporary equity, beginning balance at Dec. 31, 2018 $ 173,958        
Redeemable Convertible Preferred Stock          
Issuance of Series F redeemable convertible preferred stock, net of issuance costs (in shares) 22,663,933        
Issuance of Series F redeemable convertible preferred stock, net of issuance costs $ 129,770        
Repurchase and retirement of preferred stock in connection with tender offer (in shares) (2,295,603)        
Repurchase and retirement of preferred stock in connection with tender offer $ (855)        
Temporary equity, ending balance (in shares) at Dec. 31, 2019 117,788,521        
Temporary equity, ending balance at Dec. 31, 2019 $ 302,873        
Beginning balance (in shares) at Dec. 31, 2018   22,595,886      
Beginning balance at Dec. 31, 2018 (121,004) $ 2 $ 2,773 $ (33) $ (123,746)
Stockholders' Equity          
Repurchase and retirement of common stock in connection with tender offer (in shares)   (2,053,690)      
Repurchase and retirement of common stock in connection with tender offer (19,159)   (6,173)   (12,986)
Issuance of common stock upon exercise of stock options and vesting of early exercised options, and vesting restricted stock units (in shares)   1,882,916      
Issuance of common stock upon exercise of stock options and vesting of early exercised options, and vesting restricted stock units 1,044   1,044    
Stock-based compensation expense 3,648   3,648    
Other comprehensive loss 67     67  
Net loss (51,392)       (51,392)
Ending balance (in shares) at Dec. 31, 2019   22,425,112      
Ending balance at Dec. 31, 2019 $ (186,796) $ 2 1,292 34 (188,124)
Redeemable Convertible Preferred Stock          
Issuance of Series F redeemable convertible preferred stock, net of issuance costs (in shares) 9,294,084        
Issuance of Series F redeemable convertible preferred stock, net of issuance costs $ 84,834        
Temporary equity, ending balance (in shares) at Dec. 31, 2020 127,082,605        
Temporary equity, ending balance at Dec. 31, 2020 $ 387,707        
Stockholders' Equity          
Issuance of common stock upon exercise of stock options and vesting of early exercised options, and vesting restricted stock units (in shares)   1,864,794      
Issuance of common stock upon exercise of stock options and vesting of early exercised options, and vesting restricted stock units 2,212   2,212    
Stock-based compensation expense 5,262   5,262    
Other comprehensive loss 557     557  
Net loss (32,564)       (32,564)
Ending balance (in shares) at Dec. 31, 2020   24,289,906      
Ending balance at Dec. 31, 2020 $ (211,329) $ 2 8,766 591 (220,688)
Redeemable Convertible Preferred Stock          
Issuance of Series F redeemable convertible preferred stock, net of issuance costs (in shares) 328,026        
Issuance of Series F redeemable convertible preferred stock, net of issuance costs $ 2,980        
Conversion of redeemable convertible preferred stock to common stock in connection with direct listing (in shares) (127,410,631)        
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering $ (390,687)        
Temporary equity, ending balance (in shares) at Dec. 31, 2021 0        
Temporary equity, ending balance at Dec. 31, 2021 $ 0        
Stockholders' Equity          
Issuance of common stock in a business combination (in shares)   25,759      
Issuance of common stock 169   169    
Repayment of non-recourse promissory note 3,060   3,060    
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering (in shares)   127,410,631      
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering 390,687 $ 13 390,674    
Issuance of common stock upon initial public offering and private placements, net of offering costs, underwriting discounts and commissions (in shares)   7,581,395      
Issuance of common stock upon initial public offering and private placements, net of offering costs, underwriting discounts and commissions 305,191   305,191    
Donation of common stock (in shares)   181,961      
Donation of common stock 6,933   6,933    
Issuance of common stock upon exercise of warrants (in shares)   254,014      
Issuance of common stock upon exercise of stock options and vesting of early exercised options, and vesting restricted stock units (in shares)   4,495,889      
Issuance of common stock upon exercise of stock options and vesting of early exercised options, and vesting restricted stock units 7,421 $ 1 7,420    
Stock-based compensation expense 17,290   17,290    
Other comprehensive loss (338)     (338)  
Net loss (38,756)       (38,756)
Ending balance (in shares) at Dec. 31, 2021   164,239,555      
Ending balance at Dec. 31, 2021 $ 480,328 $ 16 $ 739,503 $ 253 $ (259,444)