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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Operating expenses:    
Research and development $ 5,806 $ 8,974
General and administrative 3,081 3,132
Total operating expenses 8,887 12,106
Loss from operations (8,887) (12,106)
Other income (expense), net (56) 18
Net loss and Total comprehensive loss $ (8,943) $ (12,088)
Net loss per share, basic $ (0.49) $ (0.76)
Net loss per share, diluted $ (0.49) $ (0.76)
Weighted average common shares outstanding, basic 18,338,853 15,996,133
Weighted average common shares outstanding, diluted 18,338,853 15,996,133