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 Expenses [Abstract]    
Trade payables $ 1,278,209 $ 895,638
Accrued expenses 53,375 95,416
Accrued research and development contract costs 1,421,705 1,435,109
Payroll liabilities 295,732 807,763
Total accounts payable and accrued expenses $ 3,049,021 $ 3,233,926