Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Entity Wide Information Revenue From External Customer [Line Items]
Total revenue	$ 125,969	$ 172,429	$ 209,411
Content And Media
Entity Wide Information Revenue From External Customer [Line Items]
Total revenue	73,814	137,038	195,080
Marketplaces
Entity Wide Information Revenue From External Customer [Line Items]
Total revenue	$ 52,155	$ 35,391	$ 14,331