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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.