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Condensed Consolidated Statement of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($)
$ in Thousands
Total
Convertible Preferred Stock
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Beginning balance at Dec. 31, 2019 $ (111,108)   $ 1 $ 18,108 $ 454 $ (129,671)
Beginning balance, (in shares) at Dec. 31, 2019   152,116,000        
Beginning balance at Dec. 31, 2019   $ 519,163        
Beginning balance, (in shares) at Dec. 31, 2019     11,181,000      
Issuance of Series C convertible preferred stock   $ 492,467        
Issuance of Series C convertible preferred stock, shares   42,905,000        
Issuance of common stock to strategic partners 1,004     1,004    
Issuance of common stock to strategic partners, shares     275,000      
Issuance of common stock for asset acquisition 4,000     4,000    
Issuance of common stock for asset acquisition, shares     688,000      
Repurchase of convertible preferred stock (3,582) $ (662)   (3,582)    
Repurchase of convertible preferred stock, shares   (547,000)        
Issuance of common stock upon exercise of stock options 35     35    
Issuance of common stock upon exercise of stock options, shares     15,000      
Repurchase of common stock (11,806)     (11,806)    
Repurchase of common stock, shares     (2,032,000)      
Stock-based compensation 20,290     20,290    
Stock-based compensation, shares     4,177,000      
Other comprehensive income 139       139  
Net loss (165,615)         (165,615)
Ending balance at Sep. 30, 2020 (266,643)   $ 1 28,049 593 (295,286)
Ending balance, (in shares) at Sep. 30, 2020   194,474,000        
Ending balance at Sep. 30, 2020   $ 1,010,968        
Ending balance, (in shares) at Sep. 30, 2020     14,304,000      
Beginning balance at Jun. 30, 2020 (240,109)   $ 1 18,266 1,191 (259,567)
Beginning balance, (in shares) at Jun. 30, 2020   194,474,000        
Beginning balance at Jun. 30, 2020   $ 1,010,968        
Beginning balance, (in shares) at Jun. 30, 2020     13,097,000      
Stock-based compensation 9,783     9,783    
Stock-based compensation, shares     1,207,000      
Other comprehensive income (598)       (598)  
Net loss (35,719)         (35,719)
Ending balance at Sep. 30, 2020 (266,643)   $ 1 28,049 593 (295,286)
Ending balance, (in shares) at Sep. 30, 2020   194,474,000        
Ending balance at Sep. 30, 2020   $ 1,010,968        
Ending balance, (in shares) at Sep. 30, 2020     14,304,000      
Beginning balance at Dec. 31, 2020 $ (292,528)   $ 2 41,357 256 (334,143)
Beginning balance, (in shares) at Dec. 31, 2020 194,474,000 194,474,000        
Beginning balance at Dec. 31, 2020 $ 1,010,968 $ 1,010,968        
Beginning balance, (in shares) at Dec. 31, 2020 15,570,000   15,570,000      
Proceeds from initial public offering, net of issuance costs, Shares     25,000,000      
Proceeds from initial public offering, net of issuance costs $ 391,802   $ 2 391,800    
Conversion of convertible preferred stock to common stock, Shares   194,474,000 194,474,000      
Conversion of convertible preferred stock to common stock 1,010,968 $ (1,010,968) $ 20 1,010,948    
Issuance of common stock upon exercise of stock options $ 2,043     2,043    
Issuance of common stock upon exercise of stock options, shares 776,449   776,000      
Stock-based compensation $ 41,023     41,023    
Stock-based compensation, shares     3,969,000      
Other comprehensive income (321)       (321)  
Net loss (166,513)         (166,513)
Ending balance at Sep. 30, 2021 $ 986,474   $ 24 1,487,171 (65) (500,656)
Ending balance, (in shares) at Sep. 30, 2021 0          
Ending balance at Sep. 30, 2021 $ 0          
Ending balance, (in shares) at Sep. 30, 2021 239,789,000   239,789,000      
Beginning balance at Jun. 30, 2021 $ 1,021,955   $ 24 1,473,639 73 (451,781)
Beginning balance, (in shares) at Jun. 30, 2021     238,549,000      
Initial public offering costs (39)     (39)    
Issuance of common stock upon exercise of stock options 529     529    
Issuance of common stock upon exercise of stock options, shares     265,000      
Stock-based compensation 13,042     13,042    
Stock-based compensation, shares     975,000      
Other comprehensive income (138)       (138)  
Net loss (48,875)         (48,875)
Ending balance at Sep. 30, 2021 $ 986,474   $ 24 $ 1,487,171 $ (65) $ (500,656)
Ending balance, (in shares) at Sep. 30, 2021 0          
Ending balance at Sep. 30, 2021 $ 0          
Ending balance, (in shares) at Sep. 30, 2021 239,789,000   239,789,000