Income Taxes - Narrative (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal income tax expense (benefit)	$ 0	$ 0	$ 0
State and local income tax expense (benefit)	$ 0	$ 0	$ 0
Statutory tax (benefit) expense	35.00%	35.00%	35.00%
Net operating loss carryforwards	$ 230,278