STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
STATEMENTS OF OPERATIONS
Revenue			$ 0
Expenses:
Research and development	$ 3,472	$ 1,569	12,856	$ 6,538
General and administrative	1,378	868	4,074	1,827
Loss from operations	(4,850)	(2,437)	(16,930)	(8,365)
Change in fair value of warrant liability		794		1,192
Interest income	15	4	44	6
Interest expense	(121)	(29)	(353)	(59)
Other income (expense)	(7)		2
Net loss	(4,963)	(1,668)	(17,237)	(7,226)
Cumulative preferred stock dividends		(372)		(2,545)
Net loss applicable to common stockholders	$ (4,963)	$ (2,040)	$ (17,237)	$ (9,771)
Per share information:
Net loss per share of common stock-basic and diluted (in dollars per share)	$ (0.35)	$ (0.22)	$ (1.21)	$ (2.79)
Basic and diluted weighted average shares outstanding (in shares)	14,289,939	9,449,355	14,194,793	3,499,808