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Condensed Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Total
Convertible Preferred Stock
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income
Accumulated Deficit
Beginning Balance at Dec. 31, 2019 $ (3,642)   $ 1 $ (3,643)
Beginning Balance, Shares at Dec. 31, 2019     15,640,133      
Issuance of Series A and Series B convertible preferred stock, net of issuance costs   $ 44,731        
Issuance of Series A and Series B convertible preferred stock, net of issuance costs, Shares   21,710,814        
Conversion of convertible debt and interest to Series A convertible preferred stock   $ 500        
Conversion of convertible debt and interest to Series A convertible preferred stock, Shares   301,685        
Settlement of bifurcated conversion liability   $ 125        
Exercises of stock options and vesting of restricted stock, Shares     247,213      
Stock-based compensation 29     29    
Unrealized gain (loss) on investments 152       152  
Net loss (4,425)         (4,425)
Ending Balance at Sep. 30, 2020 (7,886)   $ 1 29 152 (8,068)
Ending Balance, Shares at Sep. 30, 2020   22,012,499        
Ending Balance at Sep. 30, 2020   $ 45,356        
Ending Balance, Shares at Sep. 30, 2020     15,887,346      
Beginning Balance at Jun. 30, 2020 (5,539)   $ 1 14 194 (5,748)
Beginning Balance, Shares at Jun. 30, 2020   22,012,499        
Beginning Balance at Jun. 30, 2020   $ 45,356        
Beginning Balance, Shares at Jun. 30, 2020     15,782,575      
Exercises of stock options and vesting of restricted stock, Shares     104,771      
Stock-based compensation 15     15    
Unrealized gain (loss) on investments (42)       (42)  
Net loss (2,320)         (2,320)
Ending Balance at Sep. 30, 2020 (7,886)   $ 1 29 152 (8,068)
Ending Balance, Shares at Sep. 30, 2020   22,012,499        
Ending Balance at Sep. 30, 2020   $ 45,356        
Ending Balance, Shares at Sep. 30, 2020     15,887,346      
Beginning Balance at Dec. 31, 2020 $ (11,315)   $ 1 451 156 (11,923)
Beginning Balance, Shares at Dec. 31, 2020 22,012,499 22,012,499        
Beginning Balance at Dec. 31, 2020 $ 45,356 $ 45,356        
Beginning Balance, Shares at Dec. 31, 2020     15,957,821      
Issuance of Series A and Series B convertible preferred stock, net of issuance costs   $ 124,712        
Issuance of Series A and Series B convertible preferred stock, net of issuance costs, Shares   19,083,979        
Preferred stock converted into shares of common stock 170,068   $ 4 170,064    
Preferred stock converted into shares of common stock, Shares   (41,096,478)        
Preferred stock converted into shares of common stock   $ (170,068)        
Preferred stock converted into shares of common stock, Shares     25,212,548      
Initial public offering of common shares, net of $21,728 of issuance costs 254,271   $ 1 254,270    
Initial public offering of common shares, net of $21,728 of issuance costs, Shares     13,800,000      
Exercises of stock options and vesting of restricted stock 35     35    
Exercises of stock options and vesting of restricted stock, Shares     254,051      
Stock-based compensation 3,133     3,133    
Unrealized gain (loss) on investments (160)       (160)  
Net loss (24,468)         (24,468)
Ending Balance at Sep. 30, 2021 $ 391,564   $ 6 427,953 (4) (36,391)
Ending Balance, Shares at Sep. 30, 2021 0          
Ending Balance, Shares at Sep. 30, 2021     55,224,420      
Beginning Balance at Jun. 30, 2021 $ 401,601   $ 6 426,680 (12) (25,073)
Beginning Balance, Shares at Jun. 30, 2021     55,114,729      
Exercises of stock options and vesting of restricted stock 30     30    
Exercises of stock options and vesting of restricted stock, Shares     109,691      
Stock-based compensation 1,243     1,243    
Unrealized gain (loss) on investments 8       8  
Net loss (11,318)         (11,318)
Ending Balance at Sep. 30, 2021 $ 391,564   $ 6 $ 427,953 $ (4) $ (36,391)
Ending Balance, Shares at Sep. 30, 2021 0          
Ending Balance, Shares at Sep. 30, 2021     55,224,420