Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Intangible Assets by Major Class [Line Items]
Indefinite lived intangible assets, Gross Carrying Amount	$ 6,608	$ 6,581
Intangible assets, Gross Carrying Amount	7,521	7,284
Definite lived intangible assets, Gross Carrying Amount	913	703
Definite lived intangible assets, Accumulated Amortization	(435)	(346)
Definite lived intangible assets, Net Cost	478	357
Intangible assets, Net Cost	7,086	6,938
Trade Names
Intangible Assets by Major Class [Line Items]
Indefinite lived intangible assets, Gross Carrying Amount	6,497	6,497
URLs
Intangible Assets by Major Class [Line Items]
Indefinite lived intangible assets, Gross Carrying Amount	111	84
Customer and advertiser relationships
Intangible Assets by Major Class [Line Items]
Definite lived intangible assets, Gross Carrying Amount	324	324
Definite lived intangible assets, Accumulated Amortization	(197)	(179)
Definite lived intangible assets, Net Cost	127	145
Developed technology and patents
Intangible Assets by Major Class [Line Items]
Definite lived intangible assets, Gross Carrying Amount	495	285
Definite lived intangible assets, Accumulated Amortization	(206)	(139)
Definite lived intangible assets, Net Cost	289	146
Services contract and other
Intangible Assets by Major Class [Line Items]
Definite lived intangible assets, Gross Carrying Amount	94	94
Definite lived intangible assets, Accumulated Amortization	(32)	(28)
Definite lived intangible assets, Net Cost	$ 62	$ 66