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Accrued Expenses and Other Current Liabilities (Details) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]      
Compensation, benefits and payroll taxes $ 388,500 $ 310,775 $ 311,845
Other accrued expenses 382,645 94,871 160,561
Total accrued expenses and other current liabilities $ 771,145 $ 405,646 $ 472,406