Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses and other payables (Schedule of Accrued Expenses) (Details)

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Accrued Expenses and other payables (Schedule of Accrued Expenses) (Details) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Accrued Liabilities, Current [Abstract]    
Accrued clinical trial and other expenses $ 1,314,133 $ 1,504,240
Compensation and related benefits 86,038 542,434
Patent fees 13,349 40,000
Deferred rent 35,000 27,457
Other expenses 82,300 162,300
Accrued expenses $ 1,530,820 $ 2,276,431