Accrued Expenses and Other Current Liabilities (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Accounts Payable and Accrued Liabilities, Current [Abstract]
Professional fees	$ 193,000	$ 5,459,000
Research and development costs	2,208,000	2,625,000
Litigation settlement	700,000	1,000,000
Wages, bonuses and employee benefits	487,000	527,000
Other	242,000	82,000
Total	$ 3,830,498	$ 9,693,359