Accrued Expenses (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Accrued Expenses [Abstract]
Accrued research and development costs	$ 1,874,126	$ 471,267
Accrued professional fees	258,568	318,649
Accrued compensation	1,510,430	600,000
Accrued other	56,835	149,738
Deferred rent	34,389	42,508
Total	$ 3,734,348	$ 1,582,162