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Condensed Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Redeemable Convertible Preferred Stock [Member]
Temporary equity, Beginning balance at Dec. 31, 2019         $ 53,174
Temporary equity, Beginning balance, shares at Dec. 31, 2019         15,714,283
Beginning balance at Dec. 31, 2019 $ (58,777)   $ 5,010 $ (63,787)  
Beginning balance, shares at Dec. 31, 2019   664,431      
Issuance of Series B redeemable convertible preferred stock for cash, net         $ 21,458
Issuance of Series B redeemable convertible preferred stock for cash, net, Shares         10,027,666
Issuance of Series B redeemable convertible preferred stock upon conversion of convertible notes         $ 10,095
Issuance of Series B redeemable convertible preferred stock upon conversion of convertible notes, Shares         4,673,388
Exercise of common stock options and vesting of early exercised common stock options 6   6    
Exercise of common stock options and vesting of early exercised common stock options, Shares   5,350      
Stock-based compensation 47   47    
Net loss and comprehensive loss (5,279)     (5,279)  
Temporary Equity, Ending balance at Mar. 31, 2020         $ 84,727
Temporary Equity, Ending balance, shares at Mar. 31, 2020         30,415,337
Ending balance at Mar. 31, 2020 (64,003)   5,063 (69,066)  
Ending balance, shares at Mar. 31, 2020   669,781      
Beginning balance at Dec. 31, 2020 $ 382,877 $ 3 479,608 (96,734)  
Beginning balance, shares at Dec. 31, 2020 34,701,274 34,701,274      
Exercise of common stock options and vesting of early exercised common stock options $ 254   254    
Exercise of common stock options and vesting of early exercised common stock options, Shares 101,960 125,930      
Stock-based compensation $ 4,285   4,285    
Net loss and comprehensive loss (18,867)     (18,867)  
Ending balance at Mar. 31, 2021 $ 368,549 $ 3 $ 484,147 $ (115,601)  
Ending balance, shares at Mar. 31, 2021 34,827,204 34,827,204