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STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Operating expenses:    
Research and development $ 9,690 $ 9,698
General and administrative 8,544 10,238
Total operating expenses 18,234 19,936
Operating loss (13,321) (19,712)
Other income (expense):    
Interest income 400 147
Interest expense (395) (711)
Change in fair value of liability instruments   1
Total other income (expense) 5 (563)
Net loss $ (13,316) $ (20,275)
Net loss per share, basic $ (4.24) $ (11.58)
Net loss per share, diluted $ (4.24) $ (11.58)
Basic weighted average shares used in calculating net loss per share attributable to common stockholders 3,140,925 1,750,350
Diluted weighted average shares used in calculating net loss per share attributable to common stockholders 3,140,925 1,750,350
Grant [Member]    
Revenue $ 4,913 $ 224