Income Taxes - Summary of Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current income taxes
Federal			$ 0	$ 0	$ 0
State			0	0	0
Foreign			0	0	0
Deferred income taxes
Federal			0	0	0
State			0	$ 0	$ 0
Foreign			(1,024)
Income tax benefit	$ (925)	$ (99)	$ (1,024)