Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total	$ 11,699	$ 8,303
Accumulated depreciation	(4,220)	(2,044)
Property and equipment, net	7,479	6,259
Depreciation	2,200	1,100	$ 300
Computer equipment
Total	7,059	5,394
Furniture and equipment
Total	1,081	377
Leasehold improvement
Total	$ 3,559	1,747
Construction in progress
Total		$ 785