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Condensed Consolidated Statements of Stockholders’ Deficit - USD ($)
$ in Thousands
Total
Lincoln Park Purchase Agreement
At-the-Market Offering
Common stock
Common stock
Lincoln Park Purchase Agreement
Common stock
At-the-Market Offering
Additional paid-in capital
Additional paid-in capital
Lincoln Park Purchase Agreement
Additional paid-in capital
At-the-Market Offering
Accumulated deficit
Accumulated other comprehensive loss
Beginning balance (in shares) at Dec. 31, 2022       113,335,530              
Beginning balance at Dec. 31, 2022 $ (29,463)     $ 11     $ 381,274     $ (400,346) $ (10,402)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock in connection with the Lincoln Park Purchase Agreement (in shares)       39,487,104              
Issuance of common stock in connection with the Lincoln Park Purchase Agreement 61,346     $ 4     61,342        
Issuance of common stock in connection with the Employee Stock Purchase Plan (in shares)       226,453              
Issuance of common stock in connection with the Employee Stock Purchase Plan 273           273        
Exercise of stock options (in shares)       2,239,676              
Exercise of stock options 1,890           1,890        
Stock-based compensation 17,362           17,362        
Short-swing profit settlement 244           244        
Foreign currency translation adjustment, net of tax (70)                   (70)
Net loss (66,701)                 (66,701)  
Ending balance (in shares) at Sep. 30, 2023       155,288,763              
Ending balance at Sep. 30, 2023 (15,119)     $ 15     462,385     (467,047) (10,472)
Beginning balance (in shares) at Jun. 30, 2023       128,028,658              
Beginning balance at Jun. 30, 2023 (51,531)     $ 12     409,885     (450,941) (10,487)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock in connection with the Lincoln Park Purchase Agreement (in shares)       26,247,450              
Issuance of common stock in connection with the Lincoln Park Purchase Agreement 45,663     $ 3     45,660        
Issuance of common stock in connection with the Employee Stock Purchase Plan (in shares)       226,453              
Issuance of common stock in connection with the Employee Stock Purchase Plan 273           273        
Exercise of stock options (in shares)       786,202              
Exercise of stock options 683           683        
Stock-based compensation 5,884           5,884        
Foreign currency translation adjustment, net of tax 15                   15
Net loss (16,106)                 (16,106)  
Ending balance (in shares) at Sep. 30, 2023       155,288,763              
Ending balance at Sep. 30, 2023 $ (15,119)     $ 15     462,385     (467,047) (10,472)
Beginning balance (in shares) at Dec. 31, 2023 161,113,744     161,113,744              
Beginning balance at Dec. 31, 2023 $ (24,481)     $ 16     469,081     (483,061) (10,517)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock in connection with the Lincoln Park Purchase Agreement (in shares)         25,569,997 19,337,124          
Issuance of common stock in connection with the Lincoln Park Purchase Agreement   $ 32,187 $ 20,688   $ 2 $ 2   $ 32,185 $ 20,686    
Issuance of common stock in connection with the Employee Stock Purchase Plan (in shares)       262,777              
Issuance of common stock in connection with the Employee Stock Purchase Plan 171           171        
Issuance of common stock in connection with exercise of stock options and vesting of RSUs (in shares)       1,679,951              
Issuance of common stock in connection with exercise of stock options and vesting of RSUs $ 84           84        
Exercise of stock options (in shares) 93,973                    
Stock-based compensation $ 13,790           13,790        
Tax withholding related to vesting of restricted stock units (1,470)           (1,470)        
Foreign currency translation adjustment, net of tax (82)                   (82)
Net loss $ (57,802)                 (57,802)  
Ending balance (in shares) at Sep. 30, 2024 207,963,593     207,963,593              
Ending balance at Sep. 30, 2024 $ (16,915)     $ 20     534,527     (540,863) (10,599)
Beginning balance (in shares) at Jun. 30, 2024       186,073,087              
Beginning balance at Jun. 30, 2024 (21,514)     $ 18     507,067     (518,151) (10,448)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock in connection with the Lincoln Park Purchase Agreement (in shares)         10,621,447 11,058,026          
Issuance of common stock in connection with the Lincoln Park Purchase Agreement   $ 11,899 $ 11,587   $ 1 $ 1   $ 11,898 $ 11,586    
Issuance of common stock in connection with exercise of stock options and vesting of RSUs (in shares)       211,033              
Issuance of common stock in connection with exercise of stock options and vesting of RSUs 41           41        
Stock-based compensation 4,054           4,054        
Tax withholding related to vesting of restricted stock units (119)           (119)        
Foreign currency translation adjustment, net of tax (151)                   (151)
Net loss $ (22,712)                 (22,712)  
Ending balance (in shares) at Sep. 30, 2024 207,963,593     207,963,593              
Ending balance at Sep. 30, 2024 $ (16,915)     $ 20     $ 534,527     $ (540,863) $ (10,599)