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Consolidated Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit) - USD ($)
Total
Preferred stock
Convertible preferred stock
Common stock
Additional paid-in capital
Accumulated deficit
Beginning balance at Dec. 31, 2018   $ 45,105,000      
Beginning balance (in shares) at Dec. 31, 2018   4,203,139      
Ending balance at Dec. 31, 2019   $ 45,105,000      
Ending balance (in shares) at Dec. 31, 2019   4,203,139      
Beginning balance at Dec. 31, 2018 $ (51,879,000)   $ 0 $ 0 $ (51,879,000)
Beginning balance (in shares) at Dec. 31, 2018     24,522,320    
Increase (Decrease) in Stockholders' Equity          
Issuance of common stock upon exercise of stock options 482,000     482,000  
Issuance of common stock upon exercise of stock options (in shares)     2,122,810    
Stock-based compensation 1,706,000     1,706,000  
Repurchase of common stock (14,000)     (14,000)  
Shares repurchased (shares)     (55,200)    
Net loss 1,241,000       1,241,000
Ending balance at Dec. 31, 2019 (48,464,000)   $ 0 2,174,000 (50,638,000)
Ending balance (in shares) at Dec. 31, 2019     26,589,930    
Ending balance at Dec. 31, 2020 $ 45,105,000 $ 45,105,000      
Ending balance (in shares) at Dec. 31, 2020 4,203,139 4,203,139      
Increase (Decrease) in Stockholders' Equity          
Issuance of common stock upon exercise of stock options $ 1,301,000     1,301,000  
Issuance of common stock upon exercise of stock options (in shares) 2,777,010   2,777,010    
Stock-based compensation $ 17,837,000     17,837,000  
Net loss (1,710,000)       (1,710,000)
Ending balance at Dec. 31, 2020 (31,036,000)   $ 0 21,312,000 (52,348,000)
Ending balance (in shares) at Dec. 31, 2020     29,366,940    
Increase (Decrease) in Temporary Equity          
Conversion of convertible preferred stock to common stock (in shares)   (4,203,139)      
Temporary Equity, Stock Issued During Period, Value, Conversion of Convertible Securities   $ (45,105,000)      
Ending balance at Dec. 31, 2021 $ 0        
Ending balance (in shares) at Dec. 31, 2021 0        
Increase (Decrease) in Stockholders' Equity          
Conversion of convertible preferred stock to common stock $ 45,105,000   $ 5,000 45,100,000 0
Conversion of convertible preferred stock to common stock (in shares)     42,031,390    
Issuance of common stock upon exercise of warrants (in shares)     428,067    
Issuance of common stock upon initial public offering 57,458,000     57,458,000  
Issuance of common stock upon initial public offering (in shares)     2,608,696    
Issuance of common stock upon exercise of stock options $ 3,505,000   $ 1,000 3,504,000  
Issuance of common stock upon exercise of stock options (in shares) 6,965,767   6,965,767    
Vesting of early exercised stock options $ 567,000     567,000  
Stock-based compensation 14,574,000     14,574,000  
Net loss (13,558,000)       (13,558,000)
Ending balance at Dec. 31, 2021 $ 76,615,000   $ 6,000 $ 142,515,000 $ (65,906,000)
Ending balance (in shares) at Dec. 31, 2021     81,400,860