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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Loss [Member]
Accumulated Deficit [Member]
Beginning Balance, Values at Dec. 31, 2021 $ 231,909 $ 39 $ 528,365 $ (180) $ (296,315)
Beginning Balance, Shares at Dec. 31, 2021   38,560,854      
Stock-based compensation 4,252   4,252    
Exercise of stock options 19   19    
Exercise of stock options, Shares   2,711      
Foreign currency translation adjustment 3     3  
Unrealized gain (loss) on available-for-sale securities (196)     (196)  
Net loss (35,373)       (35,373)
Ending Balance, Values at Mar. 31, 2022 200,614 $ 39 532,636 (373) (331,688)
Ending Balance, Shares at Mar. 31, 2022   38,563,565      
Beginning Balance, Values at Dec. 31, 2021 231,909 $ 39 528,365 (180) (296,315)
Beginning Balance, Shares at Dec. 31, 2021   38,560,854      
Foreign currency translation adjustment (7)        
Unrealized gain (loss) on available-for-sale securities (219)        
Net loss (107,564)        
Ending Balance, Values at Sep. 30, 2022 260,602 $ 48 664,839 (406) (403,879)
Ending Balance, Shares at Sep. 30, 2022   47,626,503      
Beginning Balance, Values at Mar. 31, 2022 200,614 $ 39 532,636 (373) (331,688)
Beginning Balance, Shares at Mar. 31, 2022   38,563,565      
Stock-based compensation 4,520   4,520    
Issuance of common stock per Employee Stock Purchase Plan puchase 113   113    
Issuance of common stock per Employee Stock Purchase Plan purchase, Shares   40,341      
Foreign currency translation adjustment (6)     (6)  
Unrealized gain (loss) on available-for-sale securities (60)     (60)  
Net loss (37,137)       (37,137)
Ending Balance, Values at Jun. 30, 2022 168,044 $ 39 537,269 (439) (368,825)
Ending Balance, Shares at Jun. 30, 2022   38,603,906      
Stock-based compensation 4,911   4,911    
Exercise of stock options 45   45    
Exercise of stock options, Shares   8,763      
Issuance of common stock to a related party, net of issuance costs, Value 122,623 $ 9 122,614    
Issuance of common stock to a related party, net of issuance costs, Shares   9,013,834      
Foreign currency translation adjustment (4)     (4)  
Unrealized gain (loss) on available-for-sale securities 37     37  
Net loss (35,054)       (35,054)
Ending Balance, Values at Sep. 30, 2022 260,602 $ 48 664,839 (406) (403,879)
Ending Balance, Shares at Sep. 30, 2022   47,626,503      
Beginning Balance, Values at Dec. 31, 2022 231,194 $ 48 669,780 (372) (438,262)
Beginning Balance, Shares at Dec. 31, 2022   47,722,995      
Stock-based compensation 4,607   4,607    
Exercise of stock options 111   111    
Exercise of stock options, Shares   55,605      
Exercise of pre-funded warrants, Value   $ 3 (3)    
Exercise of pre-funded warrants, Shares   2,582,557      
Issuance of common stock to a related party, net of issuance costs, Value 17,470 $ 2 17,468    
Issuance of common stock to a related party, net of issuance costs, Shares   2,646,458      
Restricted stock vested in the period   73,058      
Foreign currency translation adjustment (5)     (5)  
Unrealized gain (loss) on available-for-sale securities 160     160  
Net loss (38,676)       (38,676)
Ending Balance, Values at Mar. 31, 2023 214,861 $ 53 691,963 (217) (476,938)
Ending Balance, Shares at Mar. 31, 2023   53,080,673      
Beginning Balance, Values at Dec. 31, 2022 $ 231,194 $ 48 669,780 (372) (438,262)
Beginning Balance, Shares at Dec. 31, 2022   47,722,995      
Exercise of stock options, Shares 55,888        
Foreign currency translation adjustment $ (8)        
Unrealized gain (loss) on available-for-sale securities 257        
Net loss (106,346)        
Ending Balance, Values at Sep. 30, 2023 156,839 $ 53 701,517 (123) (544,608)
Ending Balance, Shares at Sep. 30, 2023   53,238,985      
Beginning Balance, Values at Mar. 31, 2023 214,861 $ 53 691,963 (217) (476,938)
Beginning Balance, Shares at Mar. 31, 2023   53,080,673      
Stock-based compensation 4,660   4,660    
Exercise of stock options, Shares   283      
Issuance of common stock per Employee Stock Purchase Plan puchase 345   345    
Issuance of common stock per Employee Stock Purchase Plan purchase, Shares   70,155      
Foreign currency translation adjustment (1)     (1)  
Unrealized gain (loss) on available-for-sale securities 47     47  
Net loss (35,188)       (35,188)
Ending Balance, Values at Jun. 30, 2023 184,724 $ 53 696,968 (171) (512,126)
Ending Balance, Shares at Jun. 30, 2023   53,151,111      
Stock-based compensation 4,549   4,549    
Restricted stock vested in the period   87,874      
Foreign currency translation adjustment (2)     (2)  
Unrealized gain (loss) on available-for-sale securities 50     50  
Net loss (32,482)       (32,482)
Ending Balance, Values at Sep. 30, 2023 $ 156,839 $ 53 $ 701,517 $ (123) $ (544,608)
Ending Balance, Shares at Sep. 30, 2023   53,238,985