Income Taxes - Summary of Income Tax Benefit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current Tax Benefit
Federal	$ 0	$ 0
State	(585)	(2,019)
Total Current Tax Benefit	(585)	(2,019)
Deferred Tax Expense (Benefit)
Federal	0	0
State	0	0
Total Deferred Tax Expense (Benefit)	0	0
Total Tax Benefit	$ (585)	$ (2,019)	$ 28