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STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Costs and expenses:    
Research and development $ 7,063 $ 5,625
General and administrative 4,392 4,068
Total costs and expenses 11,455 9,693
Loss from operations (11,455) (9,693)
Interest and other income 14 7
Interest expense (4) (3)
Net loss and comprehensive loss $ (11,445) $ (9,689)
Net loss available to common stockholders per share:    
Basic and diluted $ (1.82) $ (3.31)
Weighted average shares outstanding:    
Basic and diluted 6,289,305 2,928,746