Accrued Expenses and other payables (Schedule of Accrued Expenses) (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Accrued clinical trial expenses	$ 1,345,510	$ 1,192,936
Compensation and related benefits	55,604	561,082
Deferred rent	50,459	52,889
Patent fees	45,000	40,000
Accrued expenses	$ 1,496,573	$ 1,846,907