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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Beginning balance at Dec. 31, 2020 $ 194,945 $ 4 $ 376,788 $ 22 $ (181,869)
Beginning balance, shares at Dec. 31, 2020   39,105,548      
Proceeds from follow-on offering, net of offering costs / under ATM facility, net of commissions 161,916   161,916    
Proceeds from follow-on offering, net of offering costs / under ATM facility, net of commissions, shares   4,542,500      
Proceeds from exercise of stock options 2,096   2,096    
Proceeds from exercise of stock options, shares   862,056      
Proceeds from ESPP 2,380   2,380    
Proceeds from ESPP, shares   128,289      
Restricted stock units vested, shares   266,119      
Stock-based compensation 14,378   14,378    
Foreign currency translation adjustment 49     49  
Unrealized gain (loss) on available-for-sale debt securities (237)     (237)  
Net loss (65,226)       (65,226)
Ending balance at Dec. 31, 2021 310,301 $ 4 557,558 (166) (247,095)
Ending balance, shares at Dec. 31, 2021   44,904,512      
Proceeds from exercise of stock options 1,011 $ 1 1,010    
Proceeds from exercise of stock options, shares   488,187      
Proceeds from ESPP 1,455   1,455    
Proceeds from ESPP, shares   416,514      
Restricted stock units vested, shares   897,871      
Stock-based compensation 19,433   19,433    
Foreign currency translation adjustment (277)     (277)  
Unrealized gain (loss) on available-for-sale debt securities (469)     (469)  
Net loss (113,315)       (113,315)
Ending balance at Dec. 31, 2022 218,139 $ 5 579,456 (912) (360,410)
Ending balance, shares at Dec. 31, 2022   46,707,084      
Proceeds from follow-on offering, net of offering costs / under ATM facility, net of commissions 3,513   3,513    
Proceeds from follow-on offering, net of offering costs / under ATM facility, net of commissions, shares   1,935,214      
Proceeds from exercise of stock options, shares   8      
Proceeds from ESPP 1,344   1,344    
Proceeds from ESPP, shares   999,194      
Restricted stock units vested, shares   839,194      
Stock-based compensation 14,051   14,051    
Foreign currency translation adjustment 19     19  
Unrealized gain (loss) on available-for-sale debt securities 671     671  
Net loss (108,296)       (108,296)
Ending balance at Dec. 31, 2023 $ 129,441 $ 5 $ 598,364 $ (222) $ (468,706)
Ending balance, shares at Dec. 31, 2023   50,480,694