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Condensed Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Balances at Dec. 31, 2022 $ 217,048 $ 58 $ 670,223 $ (618) $ (452,615)
Common Stock Balance, Shares at Dec. 31, 2022   57,499,541      
Exercise of common stock options 314   314    
Exercise of common stock options, Shares   53,060      
Issuance of common stock under Employee Stock Purchase Plan 1,097   1,097    
Issuance of common stock under Employee Stock Purchase Plan, Shares   239,060      
Vesting of restricted stock units, Shares   801,769      
Stock transaction associated with taxes withheld on restricted stock units (451)   (451)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (73,003)      
Stock-based compensation expense 6,021   6,021    
Issuance of common stock in connection with At-The-Market sale, net of issuance costs 10,923 $ 2 10,921    
Issuance of common stock in connection with At-The-Market sale, net of issuance costs, Shares   1,641,374      
Net unrealized gain (loss) on available-for-sale securities 511     511  
Net Income (Loss) (50,050)       (50,050)
Balances at Mar. 31, 2023 185,413 $ 60 688,125 (107) (502,665)
Common Stock Balance, Shares at Mar. 31, 2023   60,161,801      
Balances at Dec. 31, 2022 217,048 $ 58 670,223 (618) (452,615)
Common Stock Balance, Shares at Dec. 31, 2022   57,499,541      
Net unrealized gain (loss) on available-for-sale securities 625        
Net Income (Loss) (137,858)        
Balances at Sep. 30, 2023 112,432 $ 61 702,752 7 (590,473)
Common Stock Balance, Shares at Sep. 30, 2023   60,900,704      
Balances at Mar. 31, 2023 185,413 $ 60 688,125 (107) (502,665)
Common Stock Balance, Shares at Mar. 31, 2023   60,161,801      
Vesting of restricted stock units, Shares   94,500      
Stock transaction associated with taxes withheld on restricted stock units (6)   (6)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (1,296)      
Stock-based compensation expense 6,661   6,661    
Issuance of common stock in connection with At-The-Market sale, net of issuance costs 1,048   1,048    
Issuance of common stock in connection with At-The-Market sale, net of issuance costs, Shares   216,036      
Net unrealized gain (loss) on available-for-sale securities 123     123  
Net Income (Loss) (38,524)       (38,524)
Balances at Jun. 30, 2023 154,715 $ 60 695,828 16 (541,189)
Common Stock Balance, Shares at Jun. 30, 2023   60,471,041      
Issuance of common stock under Employee Stock Purchase Plan 954   954    
Issuance of common stock under Employee Stock Purchase Plan, Shares   287,019      
Vesting of restricted stock units 1 $ 1      
Vesting of restricted stock units, Shares   150,250      
Stock transaction associated with taxes withheld on restricted stock units (33)   (33)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (7,606)      
Stock-based compensation expense 6,003   6,003    
Net unrealized gain (loss) on available-for-sale securities (9)     (9)  
Net Income (Loss) (49,284)       (49,284)
Balances at Sep. 30, 2023 112,432 $ 61 702,752 7 (590,473)
Common Stock Balance, Shares at Sep. 30, 2023   60,900,704      
Balances at Dec. 31, 2023 149,649 $ 61 708,975 21 (559,408)
Common Stock Balance, Shares at Dec. 31, 2023   61,009,829      
Exercise of common stock options 117   117    
Exercise of common stock options, Shares   23,748      
Issuance of common stock under Employee Stock Purchase Plan 911   911    
Issuance of common stock under Employee Stock Purchase Plan, Shares   284,362      
Vesting of restricted stock units   $ 1 (1)    
Vesting of restricted stock units, Shares   1,215,729      
Stock transaction associated with taxes withheld on restricted stock units (374)   (374)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (77,122)      
Stock-based compensation expense 6,068   6,068    
Net unrealized gain (loss) on available-for-sale securities (134)     (134)  
Net Income (Loss) (58,213)       (58,213)
Balances at Mar. 31, 2024 98,024 $ 62 715,696 (113) (617,621)
Common Stock Balance, Shares at Mar. 31, 2024   62,456,546      
Balances at Dec. 31, 2023 149,649 $ 61 708,975 21 (559,408)
Common Stock Balance, Shares at Dec. 31, 2023   61,009,829      
Net unrealized gain (loss) on available-for-sale securities 85        
Net Income (Loss) (155,018)        
Balances at Sep. 30, 2024 111,220 $ 82 825,458 106 (714,426)
Common Stock Balance, Shares at Sep. 30, 2024   82,395,350      
Balances at Mar. 31, 2024 98,024 $ 62 715,696 (113) (617,621)
Common Stock Balance, Shares at Mar. 31, 2024   62,456,546      
Vesting of restricted stock units, Shares   107,375      
Stock transaction associated with taxes withheld on restricted stock units (37)   (37)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (8,474)      
Stock-based compensation expense 6,159   6,159    
Issuance of common stock in connection with the underwritten offering, net of issuance costs 71,527 $ 15 71,512    
Issuance of common stock in connection with the underwritten offering, net of issuance costs , Shares   14,478,764      
Issuance of common stock to Ipsen Biopharmaceuticals, Inc. (USA) under the Ipsen Investment Agreement 24,571 $ 5 24,566    
Issuance of common stock to Ipsen Biopharmaceuticals, Inc. (USA) under the Ipsen Investment Agreement ,Shares   4,827,373      
Net unrealized gain (loss) on available-for-sale securities (50)     (50)  
Net Income (Loss) (48,018)       (48,018)
Balances at Jun. 30, 2024 152,176 $ 82 817,896 (163) (665,639)
Common Stock Balance, Shares at Jun. 30, 2024   81,861,584      
Exercise of common stock options 154   154    
Exercise of common stock options, Shares   40,000      
Issuance of common stock under Employee Stock Purchase Plan 937   937    
Issuance of common stock under Employee Stock Purchase Plan, Shares   281,885      
Vesting of restricted stock units, Shares   231,950      
Stock transaction associated with taxes withheld on restricted stock units (74)   (74)    
Stock transaction associated with taxes withheld on restricted stock units,Shares   (20,069)      
Stock-based compensation expense 6,545   6,545    
Net unrealized gain (loss) on available-for-sale securities 269     269  
Net Income (Loss) (48,787)       (48,787)
Balances at Sep. 30, 2024 $ 111,220 $ 82 $ 825,458 $ 106 $ (714,426)
Common Stock Balance, Shares at Sep. 30, 2024   82,395,350