Income Taxes - Components of Provision for Income Taxes(Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Current tax benefit
Federal	$ 1,402,230	$ 171,007
State	81,611	9,953
Current tax benefit, total	1,483,841	180,960
Deferred tax expense	(172,882)	(34,405)
Income tax benefit	$ 1,310,959	$ 146,555