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Statements of Operations (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Costs and expenses:        
General and administrative $ 2,317 $ 1,406 $ 6,283 $ 5,847
Research and development 165 390 1,013 4,749
Total costs and expenses 2,482 1,796 7,296 10,596
Loss from operations (2,482) (1,796) (7,296) (10,596)
Interest and other income 473 450 1,957 675
Other loss     (5)
Net loss $ (2,009) $ (1,346) $ (5,339) $ (9,926)
Net loss per share:        
Basic (in Dollars per share) $ (0.14) $ (0.09) $ (0.37) $ (0.69)
Weighted average shares outstanding:        
Basic (in Shares) 14,501,143 14,410,143 14,415,877 14,410,143