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STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Costs and expenses:    
Research and development $ 2,179 $ 2,876
General and administrative 1,098 1,226
Total costs and expenses 3,277 4,102
Loss from operations (3,277) (4,102)
Interest and other income 7 2
Other loss (2)  
Net loss $ (3,272) $ (4,100)
Net loss per share:    
Basic and diluted $ (0.23) $ (0.33)
Weighted average shares outstanding:    
Basic and diluted 14,410,143 12,356,928