Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Licensing revenue	$ 125,000	$ 125,000	$ 250,000	$ 250,000
Operating expenses:
Research and development	3,046,631	3,336,372	6,521,907	6,777,543
General and administrative	1,649,110	1,529,305	3,117,232	3,391,830
Total operating expenses	4,695,741	4,865,677	9,639,139	10,169,373
Loss from operations	(4,570,741)	(4,740,677)	(9,389,139)	(9,919,373)
Other (expense) income:
(Loss) gain from change in valuation of earn-out milestone liability	(292,228)	408,684	(575,979)	106,028
Investment income, net	1,426	4,358	3,417	13,699
Interest expense	(29,416)	(203,353)	(91,756)	(447,551)
Other income (expense)	1,090	5	3,452	(253)
Total other (expense) income, net	(319,128)	209,694	(660,866)	(328,077)
Net loss	(4,889,869)	(4,530,983)	(10,050,005)	(10,247,450)
Deemed dividend related to warrant modification	(345,685)		(345,685)
Net loss attributable to common shareholders	$ (5,235,554)	$ (4,530,983)	$ (10,395,690)	$ (10,247,450)
Net loss per common share
Basic and diluted (in dollars per share)	$ (0.79)	$ (2.63)	$ (1.75)	$ (6.04)
Weighted average shares outstanding
Basic and diluted (in shares)	6,628,778	1,723,147	5,948,570	1,696,590