Share-Based Compensation (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 516,237	$ 2,201,401
Net share-based compensation expense, per common share:
Basic and diluted (in dollars per share)	$ 0.01	$ 0.05
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 225,342	$ 578,626
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 290,895	$ 1,622,775