Accrued Liabilities - Summary of Accrued Liabilities (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities Current [Abstract]
Payroll and benefits	$ 982,482	$ 789,852
Other	687,858	305,000
Total	$ 1,670,340	$ 1,094,852