Income Taxes - Summary of Income Tax Provision (Benefit) from Income Taxes (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Federal
Current	$ 0	$ 0
Deferred	(1,069,610)	(1,246,071)
State
Current	0	0
Deferred	763,945	(213,826)
Total	(305,665)	(1,459,897)
Change in valuation allowance	305,665	1,459,897
Income tax provision (benefit)	$ 0	$ 0