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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.