STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Costs and expenses:
Research and development	$ 2,913	$ 1,747	$ 5,507	$ 3,454
General and administrative	1,028	972	2,102	2,009
Total costs and expenses	3,941	2,719	7,609	5,463
Loss from operations	(3,941)	(2,719)	(7,609)	(5,463)
Interest and other income	47	2	68	3
Interest expense		(2)		(3)
Net loss	(3,894)	(2,719)	(7,541)	(5,463)
Change in unrealized gain on marketable securities	7		13
Comprehensive loss	$ (3,887)	$ (2,719)	$ (7,528)	$ (5,463)
Net loss per share:
Basic and diluted	$ (0.43)	$ (0.69)	$ (0.83)	$ (1.57)
Weighted average shares outstanding:
Basic and diluted	9,065,922	3,951,895	9,059,554	3,490,477