Summary of Income Tax Current and Deferred Provision (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal			$ (19)
State	18	16	4
Foreign	32	20	(3)
Total current income tax provision (benefit)	50	36	(18)
Deferred:
Federal	57	66	55
State	12	(16)	16
Foreign	(8)	3	5
Total deferred income tax provision (benefit)	61	53	76
Total income tax provision (benefit)	$ 111	$ 89	$ 58