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Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Balances at Dec. 31, 2021 $ 19,727 $ 31 $ 321,669 $ (301,973)
Common Stock Balance, Shares at Dec. 31, 2021   30,790    
Issuance of common stock, net, Shares   45,705    
Issuance of common stock, net 56,235 $ 46 56,189  
Issuance of common stock under employee stock purchase plan, Shares   194    
Issuance of common stock under employee stock purchase plan 355   355  
Issuance of common stock for deferred offering costs, Shares   184    
Issuance of common stock for deferred offering costs 600   600  
Exercise of stock options, shares   384    
Exercise of stock options 269 $ 1 268  
Release of restricted stock units, shares   357    
Issuance of Initial Warrants 2,906   2,906  
Share-based compensation 5,961   5,961  
Net Income (Loss) (65,447)     (65,447)
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, Shares   17,352    
Issuance of common stock, net 28,003 $ 17 27,986  
Issuance of common stock under employee stock purchase plan, Shares   437    
Issuance of common stock under employee stock purchase plan $ 643   643  
Exercise of stock options, shares 123 123    
Exercise of stock options $ 91   91  
Release of restricted stock units 1 $ 1    
Issuance of First Amendment warrants 674   674  
Reclassification of Tranche B warrants to additional paid-in capital 1,335   1,335  
Release of restricted stock units, shares   710    
Share-based compensation 5,373   5,373  
Net Income (Loss) (52,146)     (52,146)
Balances at Dec. 31, 2023 $ 4,580 $ 96 $ 424,050 $ (419,566)
Common Stock Balance, Shares at Dec. 31, 2023   96,236