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Condensed Statements of Stockholders Equity (Deficit) (Unaudited) - USD ($)
$ in Thousands
Total
Series 1 Convertible Preferred Stock
Preferred Stock
Series 1 Convertible Preferred Stock
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Balance at Dec. 31, 2021 $ 233,977   $ 3 $ 3 $ 598,913 $ (364,942)
Balance, Shares at Dec. 31, 2021     29,863,674      
Balance, Shares at Dec. 31, 2021       26,408,031    
Issuance of Common Stock upon exercise of stock options 98       98  
Issuance of Common Stock upon exercise of stock options, Shares       65,862    
Issuance of Common Stock pursuant to employee stock purchase plan 216       216  
Issuance of Common Stock pursuant to employee stock purchase plan, Shares       145,027    
Stock-based compensation expense 1,545       1,545  
Net loss (33,051)         (33,051)
Balance at Mar. 31, 2022 202,785   $ 3 $ 3 600,772 (397,993)
Balance, Shares at Mar. 31, 2022       26,618,920    
Balance, Shares at Mar. 31, 2022     29,863,674      
Balance at Dec. 31, 2022 $ 126,739   $ 3 $ 3 604,687 (477,954)
Balance, Shares at Dec. 31, 2022   29,863,674 29,863,674      
Balance, Shares at Dec. 31, 2022 26,795,800     26,795,800    
Issuance of Common Stock for restricted stock units (in shares)       3,450    
Issuance of Common Stock pursuant to employee stock purchase plan $ 33       33  
Issuance of Common Stock pursuant to employee stock purchase plan, Shares       68,315    
Stock-based compensation expense 1,183       1,183  
Net loss (17,831)         (17,831)
Balance at Mar. 31, 2023 $ 110,124   $ 3 $ 3 $ 605,903 $ (495,785)
Balance, Shares at Mar. 31, 2023 26,867,565     26,867,565    
Balance, Shares at Mar. 31, 2023   29,863,674 29,863,674