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Statements of Convertible Preferred Stock and Stockholders' (Deficit) Equity - USD ($)
$ in Thousands
Total
Convertible Preferred Stock
Series C Convertible Preferred Stock
Series D Convertible Preferred Stock
Common Stock
Additional Paid-in Capital
AOCI Attributable to Parent
Accumulated Deficit
Balance at Dec. 31, 2018 $ (46,140)         $ 3,961 $ (13) $ (50,088)
Balance, Shares at Dec. 31, 2018   17,396,640            
Balance at Dec. 31, 2018   $ 107,228            
Balance, Shares at Dec. 31, 2018         3,012,284      
Issuance of convertible preferred stock     $ 61,705          
Issuance of convertible preferred stock, Shares     5,469,606          
Exercise of stock options 100         100    
Exercise of stock options, Shares         33,916      
Stock-based compensation expense 908         908    
Net loss (25,352)             (25,352)
Unrealized gain on available for sale investments 10           10  
Balance at Dec. 31, 2019 $ (70,474)         4,969 (3) (75,440)
Balance, Shares at Dec. 31, 2019 22,866,246 22,866,246 5,469,606          
Balance at Dec. 31, 2019 $ 168,933 $ 168,933 $ 61,705          
Balance, Shares at Dec. 31, 2019         3,046,200      
Issuance of convertible preferred stock       $ 69,790        
Issuance of convertible preferred stock, Shares       5,321,864        
Conversion of convertible preferred stock to common stock $ (238,723)              
Conversion of convertible preferred stock to common stock, Shares (28,188,110)              
Conversion of convertible preferred stock to common stock $ 238,723         238,723    
Conversion of convertible preferred stock to common stock, Shares         28,188,110      
Exercise of warrants 194         194    
Exercise of warrants, Shares         9,688      
Issuance of common stock, net of issuance costs 223,176         223,176    
Issuance of common stock, net of issuance costs, Shares         13,529,750      
Exercise of stock options 6         6    
Exercise of stock options, Shares         4,070      
Stock-based compensation expense 1,933         1,933    
Net loss (34,440)             (34,440)
Unrealized gain on available for sale investments 3           3  
Balance at Dec. 31, 2020 $ 359,121         469,001   (109,880)
Balance, Shares at Dec. 31, 2020         44,777,818      
Exercise of stock options, Shares 608,800              
Exercise of stock options and common stock issued under the 2020 ESPP $ 2,022         2,022    
Exercise of stock options and common stock issued under the 2020 ESPP, Shares         655,866      
Stock-based compensation expense 5,340         5,340    
Net loss (57,846)             (57,846)
Unrealized gain on available for sale investments (78)           (78)  
Balance at Dec. 31, 2021 $ 308,559         $ 476,363 $ (78) $ (167,726)
Balance, Shares at Dec. 31, 2021         45,433,684