Accrued Expenses (Schedule of Accrued Expenses) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Accrued clinical trial expenses	$ 580,218	$ 1,192,936
Compensation and related benefits	642,532	561,082
Deferred rent	42,423	52,889
Patent fees	40,000	40,000
Accrued expenses	$ 1,305,173	$ 1,846,907