Accrued Expenses (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Accrued Expenses [Abstract]
Accrued research and development costs	$ 76,600	$ 2,857,025
Accrued professional fees	69,083	267,646
Accrued compensation	27,405	1,886,638
Accrued other	213,074	385,896
Deferred rent	32,957	25,000
Total	$ 419,119	$ 5,422,205