Provision (Benefit) for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
Federal
State	61	67	86
Foreign	(409)	(166)	273
Current Income Tax Expense (Benefit), Total	(348)	(99)	359
Deferred
Federal	(171)	(178)	(30)
State			13
Foreign	(62)	22	75
Deferred income taxes	(220)	(166)	51
Income tax provision (benefit)	$ (581)	$ (255)	$ 417