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Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Operating expenses:        
Research and development $ 13,843 $ 11,462 $ 28,916 $ 23,297
General and administrative 6,279 6,423 12,686 13,206
Total operating expenses 20,122 17,885 41,602 36,503
Loss from operations (20,122) (17,885) (41,602) (36,503)
Other income (expense):        
Interest income, net 2,696 604 5,022 832
Other income (expense), net (6) (31) 20 (72)
Total other income (expense) 2,690 573 5,042 760
Loss before (benefit) provision for income taxes (17,432) (17,312) (36,560) (35,743)
(Benefit) provision for income taxes 4 (2) 4  
Net loss (17,436) (17,310) (36,564) (35,743)
Unrealized (loss) gain on available for sale investments, net of tax (212) (357) 117 (945)
Comprehensive loss $ (17,648) $ (17,667) $ (36,447) $ (36,688)
Net loss per share - basic $ (0.38) $ (0.38) $ (0.8) $ (0.79)
Net loss per share - diluted $ (0.38) $ (0.38) $ (0.8) $ (0.79)
Weighted-average common shares outstanding - basic 45,813,132 45,571,067 45,793,355 45,518,845
Weighted-average common shares outstanding - diluted 45,813,132 45,571,067 45,793,355 45,518,845