Income Taxes - Schedule of Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Expected income tax benefit at the federal statutory tax rate	35.00%	34.00%	34.00%
State income taxes, net of federal benefit	(3.90%)	5.40%	(4.30%)
Other	3.60%	1.70%	3.80%
Change in valuation allowance	(26.60%)	(42.20%)	(33.50%)
Income tax expense (benefit)	8.10%	(1.10%)	0.00%