Consolidated Statements of Comprehensive Loss (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cost of Revenue
Cost and expenses with related parties	$ 0	$ 0	$ 405
Sales and Marketing
Cost and expenses with related parties	$ 13,910	$ 20,852	$ 19,443