Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Grant	$ 1,373	$ 3,427	$ 2,232	$ 3,427
Operating expenses:
Research and development	4,420	2,736	8,017	4,358
General and administrative	2,448	2,123	4,277	2,970
Total operating expenses	6,868	4,859	12,294	7,328
Loss from operations	(5,495)	(1,432)	(10,062)	(3,901)
Other income (expense):
Interest income	74	5	100	6
Other expense, net	(9)		(15)
Total other income (expense)	65	5	85	6
Net loss	(5,430)	(1,427)	(9,977)	(3,895)
Deemed dividend to convertible preferred Stockholders				(228)
Net loss attributable to common stockholders	$ (5,430)	$ (1,427)	$ (9,977)	$ (4,123)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.46)	$ (2.44)	$ (1.61)	$ (7.12)
Weighted-average common shares outstanding, basic and diluted	11,776,058	585,798	6,208,379	579,520