Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating expenses:
Research and development	$ 1,759,305	$ 1,941,743	$ 3,946,420	$ 5,739,456
General and administrative	1,559,399	3,852,406	4,908,424	10,070,878
Depreciation	27,374	5,822	39,767	19,520
Loss from operations	3,346,078	5,799,971	8,894,611	15,829,854
Other expense (income):
Interest (income) expense, net	(1,318)	1,378	73,290	854
Change in fair value of warrant liability (Note 11)	(8,441,616)		(18,909,792)
Warrant related expenses (Note 8)			10,225,846
Other financing expenses			2,870,226
Income (loss) from operations before income tax benefit	5,096,856	(5,801,349)	(3,154,181)	(15,830,708)
Income tax benefit		(364,796)		(364,796)
Net income (loss)	$ 5,096,856	$ (5,436,553)	$ (3,154,181)	$ (15,465,912)
Per share information:
Net income (loss) per share of common stock, basic (in dollars per share)	$ 0.21	$ (0.53)	$ (0.35)	$ (1.52)
Net income (loss) per share of common stock, diluted (in dollars per share)	$ 0.20	$ (0.53)	$ (1.83)	$ (1.52)
Weighted average shares outstanding, basic (in shares)	13,937,869	10,333,898	11,709,128	10,198,491
Weighted average shares outstanding, diluted (in shares)	14,714,853	10,333,898	12,525,707	10,198,491