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, 2018
Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid manufacturing expense $ 2,026,833 $ 1,551,597
Prepaid insurance 335,583 218,750
Other prepaid expenses 95,320 87,937
Other current assets 20,015 108,973
Prepaid expenses and other current assets $ 2,477,751 $ 1,967,257