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STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Costs and expenses:    
Research and development $ 1,833 $ 4,239
General and administrative 3,981 3,879
Total costs and expenses 5,814 8,118
Loss from operations (5,814) (8,118)
Interest and other income 172 162
Interest expense (7) (8)
Loss before income taxes (5,649) (7,964)
Income tax benefit 167 31
Net loss (5,482) (7,933)
Change in unrealized loss on marketable securities   2
Comprehensive loss $ (5,482) $ (7,931)
Net loss per share:    
Basic and diluted $ (4.15) $ (10.31)
Weighted average shares outstanding:    
Basic and diluted 1,321,234 769,392