Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses (Schedule of Accrued Expenses) (Details)

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Accrued Expenses (Schedule of Accrued Expenses) (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Accrued Liabilities, Current [Abstract]    
Accrued clinical trial and other expenses $ 719,116 $ 919,750
Compensation and related benefits 102,490 628,147
Patent fees 45,000 40,000
Deferred rent 7,854
Other expenses 82,300 82,300
Accrued expenses $ 948,906 $ 1,678,051