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 ($)
Mar. 31, 2019
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid manufacturing expense $ 491,869 $ 559,110
Prepaid insurance 169,249 284,931
Other prepaid expenses and current assets 157,544 117,276
Prepaid expenses and other current assets $ 818,662 $ 961,317