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Principal Activities and Organization - Additional Information (Detail) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 19, 2015 shares | Dec. 31, 2017 Segment shares | Dec. 31, 2016 shares | Dec. 08, 2015 | Oct. 02, 2014
Organization And Principal Business [Line Items] |  |  |  |  |  |  |
Number of reportable segments | Segment |  | 2 |  |  |  |  |
Reverse stock split ratio | 0.2 |  |  |  |  |  |
Common stock, shares authorized prior to the Reverse Split | 1,000,000,000 |  |  |  |  |  |
Common stock, shares authorized | 200,000,000 | 200,000,000 | [1] | 200,000,000 | [1] |  |
Preferred stock, shares authorized | 10,000,000 | 10,000,000 |  | 10,000,000 |  |  |
Interactive Data [Member] |  |  |  |  |  |  |
Organization And Principal Business [Line Items] |  |  |  |  |  |  |
Membership interest acquired |  |  |  |  |  |  | 100.00%
Business acquisition date |  | Oct. 02, 2014 |  | Oct. 02, 2014 |  |  |
Fluent Acquisition [Member] |  |  |  |  |  |  |
Organization And Principal Business [Line Items] |  |  |  |  |  |  |
Membership interest acquired |  |  |  |  |  | 100.00% |
Business acquisition date |  | Dec. 08, 2015 |  | Dec. 08, 2015 |  |  |
[1] | All share data have been retroactively restated to reflect cogint’s one-for-five Reverse Split, which was effective on March 19, 2015, as discussed above.

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