Summary of Accrued Liabilities (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Employee compensation and benefits	$ 1,088,773	$ 1,240,314
Employee compensation for future absences	173,533	154,107
Interest	82,591	77,917
Professional fees	79,029	140,385
Other	246,360	302,545
Total accrued liabilities	$ 1,670,286	$ 1,915,268