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STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Costs and expenses:    
Research and development $ 4,749 $ 13,832
General and administrative 5,847 5,503
Total costs and expenses 10,596 19,335
Loss from operations (10,596) (19,335)
Interest and other income 675 13
Other loss (5)  
Net loss $ (9,926) $ (19,322)
Net loss per share:    
Basic $ (0.69) $ (1.39)
Diluted $ (0.69) $ (1.39)
Weighted average shares outstanding:    
Basic 14,410,143 13,903,871
Diluted 14,410,143 13,903,871