Intangible Assets - Summary of Gross Carrying Amount and Accumulated Amortization for Intangible Assets Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross	$ 138,569	$ 138,569
Accumulated Amortization	(76,058)	(68,817)
Net	$ 62,511	$ 69,752
Weighted Average Amortization Period (Years)	2 years 9 months 18 days	3 years
Media Service Rights
Finite Lived Intangible Assets [Line Items]
Gross	$ 34,684	$ 34,684
Accumulated Amortization	(18,426)	(16,098)
Net	$ 16,258	$ 18,586
Weighted Average Amortization Period (Years)	2 years	2 years 2 months 12 days
Promotion Service Rights
Finite Lived Intangible Assets [Line Items]
Gross	$ 30,548	$ 30,548
Accumulated Amortization	(12,104)	(10,682)
Net	$ 18,444	$ 19,866
Weighted Average Amortization Period (Years)	3 years 4 months 24 days	3 years 7 months 6 days
Developed Technologies
Finite Lived Intangible Assets [Line Items]
Gross	$ 27,170	$ 27,170
Accumulated Amortization	(14,419)	(12,790)
Net	$ 12,751	$ 14,380
Weighted Average Amortization Period (Years)	3 years	3 years 2 months 12 days
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross	$ 22,690	$ 22,690
Accumulated Amortization	(13,266)	(12,267)
Net	$ 9,424	$ 10,423
Weighted Average Amortization Period (Years)	3 years 1 month 6 days	3 years 3 months 18 days
Data Access Rights
Finite Lived Intangible Assets [Line Items]
Gross	$ 10,801	$ 10,801
Accumulated Amortization	(6,885)	(6,415)
Net	$ 3,916	$ 4,386
Weighted Average Amortization Period (Years)	2 years	2 years 3 months 18 days
Domain Names
Finite Lived Intangible Assets [Line Items]
Gross	$ 5,948	$ 5,948
Accumulated Amortization	(5,557)	(5,540)
Net	$ 391	$ 408
Weighted Average Amortization Period (Years)	7 months 6 days	9 months 18 days
Trade Names
Finite Lived Intangible Assets [Line Items]
Gross	$ 2,823	$ 2,823
Accumulated Amortization	(1,724)	(1,560)
Net	$ 1,099	$ 1,263
Weighted Average Amortization Period (Years)	2 years	2 years 2 months 12 days
Vendor Relationships
Finite Lived Intangible Assets [Line Items]
Gross	$ 2,510	$ 2,510
Accumulated Amortization	(2,375)	(2,172)
Net	$ 135	$ 338
Weighted Average Amortization Period (Years)	2 months 12 days	4 months 24 days
Patents
Finite Lived Intangible Assets [Line Items]
Gross	$ 975	$ 975
Accumulated Amortization	(882)	(873)
Net	$ 93	$ 102
Weighted Average Amortization Period (Years)	2 years 7 months 6 days	2 years 9 months 18 days
Registered Users
Finite Lived Intangible Assets [Line Items]
Gross	$ 420	$ 420
Accumulated Amortization	$ (420)	$ (420)
Weighted Average Amortization Period (Years)	0 years	0 years