CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements of Operations
Revenue	$ 123,157	$ 77,384	$ 43,528
Cost of revenue	31,971	21,041	9,929
Gross profit	91,186	56,343	33,599
Operating expenses:
Advertising and marketing	34,720	20,236	7,662
Sales	26,243	17,976	11,571
Technology and development	21,815	14,210	7,573
Legal	4,117	8,878	1,311
Regulatory	3,158	2,433	429
Acquisition related costs	6,959	551	196
General and administrative	48,568	42,981	17,687
Depreciation and amortization	8,270	4,863	2,320
Loss from operations	(62,664)	(55,785)	(15,150)
Amortization of warrants and loss on extinguishment of debt	8,454
Interest expense, net	2,588	2,199	1,499
Net loss before taxes	(73,706)	(57,984)	(16,649)
Income tax provision	(510)	(36)	(388)
Net loss	$ (74,216)	$ (58,020)	$ (17,037)
Net loss per share, basic and diluted	$ (1.75)	$ (2.91)	$ (10.25)
Weighted-average shares used to compute basic and diluted net loss per share	42,330,908	19,917,348	1,962,845