Accounts Payable and Accrued Expenses (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Accounts Payable and Accrued Liabilities
Accounts payable	$ 2,104,119	$ 3,614,015
Accrued expenses	1,361,769	804,691
Accrued compensation	3,606,642	2,583,459
Accounts Payable and Accrued Expenses	$ 7,072,530	$ 7,002,165