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Condensed Statements of Stockholders' (Deficit) Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Balances at Dec. 31, 2022 $ 20,606 $ 78 $ 387,948 $ (367,420)
Common Stock Balance, Shares at Dec. 31, 2022   77,614    
Issuance of common stock, net (61)   (61)  
Issuance of common stock under employee stock purchase plan 420   420  
Issuance of common stock under employee stock purchase plan, Shares   270    
Exercise of stock options 6   6  
Exercise of stock options, shares   9    
Release of restricted stock units, shares   86    
Share-based compensation 2,281   2,281  
Net Income (Loss) (18,702)     (18,702)
Balances at Mar. 31, 2023 4,550 $ 78 390,594 (386,122)
Common Stock Balance, Shares at Mar. 31, 2023   77,979    
Balances at Dec. 31, 2023 4,580 $ 96 424,050 (419,566)
Common Stock Balance, Shares at Dec. 31, 2023   96,236    
Issuance of common stock, net 607 $ 1 606  
Issuance of common stock, net, Shares   314    
Issuance of common stock under employee stock purchase plan 282   282  
Issuance of common stock under employee stock purchase plan, Shares   216    
Exercise of stock options $ 3   3  
Exercise of stock options, shares 6 6    
Release of restricted stock units, shares   387    
Share-based compensation $ 2,640   2,640  
Net Income (Loss) (13,614)     (13,614)
Balances at Mar. 31, 2024 $ (5,502) $ 97 $ 427,581 $ (433,180)
Common Stock Balance, Shares at Mar. 31, 2024   97,159