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CONDENSED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Operating expenses:    
Research and development $ 1,785 $ 1,127
General and administrative 2,141 1,352
Total operating expenses 3,926 2,479
Operating loss (3,926) (2,479)
Other income (expense):    
Interest income 7 4
Interest expense (198) (247)
Change in fair value of liability instruments 1 2
Total other expense (190) (241)
Net loss $ (4,116) $ (2,720)
Net loss per share, basic and diluted $ (0.19) $ (0.33)
Basic and diluted weighted average shares used in calculating net loss per share attributable to common stockholders 21,507,061 8,267,901