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Summary of Accrued Liabilities (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Payables And Accruals [Abstract]    
Employee compensation and benefits $ 683,197 $ 1,088,773
Employee compensation for future absences 198,682 173,533
Interest 60,240 82,591
Professional fees 89,795 79,029
Other 181,697 246,360
Total accrued liabilities $ 1,213,611 $ 1,670,286