Organization and Business - Customer Concentration (Details) - Customer Concentration Risk - Net Revenue	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Yahoo! and Google
Concentration Risk [Line Items]
Percentage of concentration risk (as percent)	69.80%	85.30%
Yahoo!
Concentration Risk [Line Items]
Percentage of concentration risk (as percent)	51.40%	73.60%
Google
Concentration Risk [Line Items]
Percentage of concentration risk (as percent)	18.40%	11.70%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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