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Principal Activities and Organization - Additional Information (Detail) |  | 12 Months Ended |
--- | --- | --- | ---
Mar. 19, 2015 shares | Dec. 31, 2015 shares | Dec. 31, 2014 shares | Oct. 02, 2014
Organization And Principal Business [Line Items] |  |  |  |  |
Reverse stock split ratio |  | 0.2 | 0.2 | 0.2 |
Common stock, shares authorized | [1] |  | 200,000,000 | 200,000,000 |
Preferred stock, shares authorized |  | 10,000,000 |  |  |
Reverse Stock Split [Member] |  |  |  |  |
Organization And Principal Business [Line Items] |  |  |  |  |
Common stock, shares increase decrease |  | 1,000,000,000 |  |  |
Common stock, shares authorized |  | 200,000,000 |  |  |
Interactive Data [Member] |  |  |  |  |
Organization And Principal Business [Line Items] |  |  |  |  |
Membership interest acquired |  |  |  |  | 100.00%
Fluent Acquisition [Member] |  |  |  |  |
Organization And Principal Business [Line Items] |  |  |  |  |
Membership interest acquired |  |  | 100.00% |  |
Business acquisition date |  |  | Dec. 08, 2015 |  |
Best One Inc [Member] | Interactive Data [Member] |  |  |  |  |
Organization And Principal Business [Line Items] |  |  |  |  |
Membership interest acquired |  |  |  |  | 100.00%
[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.

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