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STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Operating expenses:    
Research and development $ 54,199 $ 50,192
General and administrative 21,710 20,573
Total operating expenses 75,909 70,765
Loss from operations (75,909) (70,765)
Other income, net 1,176 1,376
Net loss $ (74,733) $ (69,389)
Net loss per common share    
Basic (in dollars per share) $ (2.69) $ (2.51)
Diluted (in dollars per share) $ (2.69) $ (2.51)
Weighted average shares outstanding    
Basic (in shares) 27,744,209 27,615,977
Diluted (in shares) 27,744,209 27,615,977
Comprehensive loss:    
Net loss $ (74,733) $ (69,389)
Unrealized (loss) on marketable securities (831) (1,442)
Total comprehensive loss $ (75,564) $ (70,831)