Provision (Benefit) for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Current:
Federal			$ 0	$ 0
State			9	5
Total			9	5
Deferred:
Federal				(7)
State				(1)
Total				(8)
Total:
Federal				(7)
State			9	4
Total	$ 1	$ (7)	$ 9	$ (3)