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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Operating expenses        
Research and development $ 7,452 $ 7,658 $ 19,830 $ 17,553
General and administrative 3,146 2,848 9,910 9,929
Total operating expenses 10,598 10,506 29,740 27,482
Loss from operations (10,598) (10,506) (29,740) (27,482)
Other income/(expense), net 127 3 158 7
Loss before income tax benefit (10,471) (10,503) (29,582) (27,475)
Income tax benefit   686   1,775
Net loss and comprehensive loss $ (10,471) $ (9,817) $ (29,582) $ (25,700)
Net loss per share, basic $ (0.73) $ (0.66) $ (2.07) $ (1.73)
Net loss per share, diluted $ (0.73) $ (0.66) $ (2.07) $ (1.73)
Weighted Average Number of Shares Outstanding, Basic 14,265,905 14,815,852 14,289,729 14,820,822
Weighted Average Number of Shares Outstanding, Diluted 14,265,905 14,815,852 14,289,729 14,820,822