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Basis of Presentation and Summary of Significant Accounting Policies - Revenue Recognition (Detail) | 9 Months Ended
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Sep. 30, 2018
Accounting Standards Update 2014-09 |
Disaggregation Of Revenue [Line Items] |
Revenue, performance obligation, description of payment terms | The Company invoices its clients on a monthly basis for the purchases occurring during the month. Invoice payment terms, negotiated on a client-by-client basis, are typically between 30 to 90 days. However, for certain agency clients with sequential liability terms, payments are not due to the Company until such agency client has received payment from its customers who are advertisers.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130554-203045 + Details
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- Details
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