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Summary of Accrued Liabilities (Details) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Payables And Accruals [Abstract]    
Employee compensation and benefits $ 1,448,208 $ 1,088,773
Employee compensation for future absences 193,662 173,533
Interest 48,702 82,591
Professional fees 108,136 79,029
Other 198,862 246,360
Total accrued liabilities $ 1,997,570 $ 1,670,286