Quarterly report pursuant to Section 13 or 15(d)

Accounts Payable and Accrued Expenses (Details)

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Accounts Payable and Accrued Expenses (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Accounts Payable and Accrued Liabilities    
Accounts payable $ 3,297,419 $ 3,237,962
Accrued expenses 2,124,507 1,770,956
Accrued compensation 3,288,757 3,943,143
Accounts Payable and Accrued Expenses $ 8,710,683 $ 8,952,061