Quarterly report pursuant to Section 13 or 15(d)

Prepaid Expenses and Other Current Assets (Schedule of Prepaid Expenses and Other Current Assets) (Details)

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Prepaid Expenses and Other Current Assets (Schedule of Prepaid Expenses and Other Current Assets) (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid lease costs $ 257,916
Prepaid manufacturing expense 134,500 559,110
Prepaid insurance 92,972 284,931
Prepaid clinical study expenses 172,075
Other prepaid expenses and current assets 77,325 117,276
Prepaid expenses and other current assets $ 734,788 $ 961,317