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Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Balances at Dec. 31, 2020 $ 41,166 $ 27 $ 299,953 $ (258,814)
Common Stock Balance, Shares at Dec. 31, 2020   26,562,000    
Issuance of common stock, net shares   3,757,000    
Issuance of common stock, net 15,679 $ 4 15,675  
Issuance of common stock under employee stock purchase plan, Shares   43,000    
Issuance of common stock under employee stock purchase plan 328   328  
Exercise of stock options, shares   428,000    
Exercise of stock options 769   769  
Share-based compensation 4,944   4,944  
Net loss (43,159)     (43,159)
Balances at Dec. 31, 2021 19,727 $ 31 321,669 (301,973)
Common Stock Balance, Shares at Dec. 31, 2021   30,790,000    
Issuance of common stock, net shares   45,705,000    
Issuance of common stock, net 56,235 $ 46 56,189  
Issuance of common stock under employee stock purchase plan, Shares   194,000    
Issuance of common stock under employee stock purchase plan 355   355  
Issuance of common stock for deferred offering costs, Shares   184,000    
Issuance of common stock for deferred offering costs $ 600   600  
Exercise of stock options, shares 384,000 384,000    
Exercise of stock options $ 269 $ 1 268  
Release of restricted stock units, shares   357,000    
Issuance of Initial Warrants 2,906   2,906  
Share-based compensation 5,961   5,961  
Net 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   77,614,000