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Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 08, 2015 | Oct. 02, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Mar. 21, 2015
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Common stock, par value |  |  |  | $ 0.0005 | [1] | $ 0.0005 | [1] | $ 0.0005
Goodwill |  |  |  | $ 161,753 | [2] | $ 5,227 | [3] |
Acquisition related costs |  |  |  | 879 |  |  |  |
Acquisition related net income tax benefit |  |  |  | 4,381 |  | 12,634 |  |
Contingent earn out payments |  |  |  | 14,300 |  |  |  |
Advertising Business [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Assets and liabilities disposed value |  |  |  | 0 |  |  |  |
Amortization Expense [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business acquisitions pro forma adjustments |  |  |  | 9,412 |  | 2,759 |  |
Interest Expense [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business acquisitions pro forma adjustments |  |  |  | 6,906 |  | 2,015 |  |
Share Based Compensation Expense [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business acquisitions pro forma adjustments |  |  |  | 2,553 |  | 32,386 |  |
Information Services [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill |  |  |  | 42,623 | [2] | $ 5,227 | [3] |
Performance Marketing [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill | [2] |  |  | $ 119,130 |  |  |  |
Customer Relationship [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  | 7 years |  |  |  |
Trademarks [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  | 20 years |  |  |  |
Domain Names [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  | 20 years |  |  |  |
Developed Technology [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  | 5 years |  |  |  |
Database [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  | 10 years |  |  |  |
Non-competition Agreements [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  | 5 years |  |  |  |
Interactive Data [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Percentage of outstanding stocks acquired |  |  | 100.00% |  |  |  |  |
Issuance of convertible preferred stock as a result of acquisition |  |  | 284,445 |  |  |  |  |
Acquisition price, cash |  |  | $ 6,320 |  |  |  |  |
Goodwill |  |  |  | $ 5,227 |  |  |  |
Fluent Acquisition [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Percentage of outstanding stocks acquired |  |  |  | 100.00% |  |  |  |
Convertible preferred stock conversion into common stock |  |  |  | 15,001,850 |  |  |  |
Common stock, par value |  |  |  | $ 0.0005 |  |  |  |
Acquisition price, cash |  |  |  | $ 99,300 |  |  |  |
Fluent Acquisition [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Issuance of convertible preferred stock as a result of acquisition |  | 300,037 |  | 300,037 |  |  |  |
Convertible preferred stock, par value |  |  |  | $ 0.0001 |  |  |  |
[1] | All share data for all periods have been retroactively restated to reflect IDI's 1-for-5 reverse stock split, which was effective on March 19, 2015.
[2] | As the Company completed the Fluent Acquisition on December 8, 2015, the related operating results for the year ended December 31, 2015 included Fluent's financial data from December 9, 2015 through December 31, 2015.
[3] | As IDI Holdings, the accounting acquirer of the merger consummated effective as of March 21, 2015, was incorporated on September 22, 2014, the financial data for the corresponding period in 2014 were from September 22, 2014, the date of inception, through December 31, 2014.

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