Note 2 - Acquisition (Detail) - Intangible Assets Acquired And Their Respective Weighted Average Lives (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
RealEstate.com [Member] | Trademarks [Member]
Amount (in Dollars)	$ 7,051
Weighted Average Life	5 years
RealEstate.com [Member] | Developed Technology Rights [Member]
Amount (in Dollars)	1,199
Weighted Average Life	3 years
RealEstate.com [Member] | Total [Member]
Amount (in Dollars)	8,250
Weighted Average Life	4 years 255 days
SharperAgent [Member] | Developed Technology Rights [Member]
Amount (in Dollars)	1,078
Weighted Average Life	3 years
SharperAgent [Member] | Total [Member]
Amount (in Dollars)	1,403
Weighted Average Life	3 years
SharperAgent [Member] | Customer Base [Member]
Amount (in Dollars)	325
Weighted Average Life	3 years
KWKLY [Member] | Developed Technology Rights [Member]
Amount (in Dollars)	445
Weighted Average Life	3 years
KWKLY [Member] | Total [Member]
Amount (in Dollars)	570
Weighted Average Life	2 years 255 days
KWKLY [Member] | Customer Base [Member]
Amount (in Dollars)	50
Weighted Average Life	3 years
KWKLY [Member] | Home Listing Datafeeds [Member]
Amount (in Dollars)	$ 75
Weighted Average Life	1 year