Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended					12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended		3 Months Ended		12 Months Ended					12 Months Ended	1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Customer relationships	Dec. 31, 2011 Customer relationships	Dec. 31, 2012 Customer relationships Weighted Average	Dec. 31, 2011 Customer relationships Weighted Average	Dec. 31, 2012 Trade name	Dec. 31, 2011 Trade name	Dec. 31, 2012 Trade name Weighted Average	Dec. 31, 2011 Trade name Weighted Average	Dec. 31, 2012 Contributor content	Dec. 31, 2011 Contributor content	Dec. 31, 2012 Contributor content Weighted Average	Dec. 31, 2011 Contributor content Weighted Average	Dec. 31, 2012 Non-compete agreement	Dec. 31, 2011 Non-compete agreement	Dec. 31, 2012 Non-compete agreement Weighted Average	Dec. 31, 2011 Non-compete agreement Weighted Average	Dec. 31, 2012 Domain name	Sep. 30, 2012 Domain name	Dec. 31, 2011 Domain name	Dec. 31, 2012 Domain name Weighted Average	Dec. 31, 2011 Domain name Weighted Average	Dec. 31, 2012 Patents	Mar. 31, 2012 Patents	Dec. 31, 2012 Patents Weighted Average	Apr. 30, 2012 Patents Minimum	Apr. 30, 2012 Patents Maximum
Amortizing intangible assets:
Gross Carrying Amount	$ 1,829	$ 1,575		$ 600	$ 600			$ 400	$ 400			$ 450	$ 450			$ 100	$ 100			$ 86		$ 25			$ 193
Accumulated Amortization	(789)	(546)		(486)	(338)			(91)	(64)			(98)	(68)			(100)	(75)			(3)		(1)			(11)
Net Carrying Amount	1,040	1,029		114	262			309	336			352	382				25			83		24			182
Weighted Average Life (Years)						4 years	4 years			14 years	14 years			15 years	15 years			3 years	3 years				15 years	15 years			17 years
Acquisition of intangible assets																				50	10	25				193
Amortization period																				15 years	15 years	15 years						16 years	19 years
Amortization expense	243	244	242
Estimated amortization expense
2013	191
2014	78
2015	78
2016	78
2017	78
Thereafter	$ 537