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Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Operating expenses:        
Research and development $ 13,586 $ 13,666 $ 42,503 $ 36,963
General and administrative 6,042 5,709 18,727 18,915
Total operating expenses 19,628 19,375 61,230 55,878
Loss from operations (19,628) (19,375) (61,230) (55,878)
Other income (expense):        
Interest income, net 2,984 1,124 8,005 1,830
Other income (expense), net 4 13 24 67
Total other income (expense) 2,988 1,137 8,029 1,897
Loss before (benefit) provision for income taxes (16,640) (18,238) (53,201) (53,981)
(Benefit) provision for income taxes   (9) 3 (9)
Net loss (16,640) (18,229) (53,204) (53,972)
Unrealized (loss) gain on available for sale investments, net of tax (27) (2) 90 (947)
Comprehensive loss $ (16,667) $ (18,231) $ (53,114) $ (54,919)
Net loss per share - basic $ (0.34) $ (0.4) $ (1.13) $ (1.18)
Net loss per share - diluted $ (0.34) $ (0.4) $ (1.13) $ (1.18)
Weighted-average common shares outstanding - basic 49,047,296 45,622,957 46,889,921 45,556,635
Weighted-average common shares outstanding - diluted 49,047,296 45,622,957 46,889,921 45,556,635