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Acquisitions - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Nov. 03, 2017
Jun. 08, 2016
Dec. 08, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]            
Common stock, par value       $ 0.0005 $ 0.0005  
Acquisition consideration payable in stock         $ 10,225  
Goodwill       $ 166,256 166,256  
Write-off of long-lived assets       3,626 $ 4,055  
Non-cash contingent earn-out costs           $ 14,300
Discontinued Operations, Disposed of by Sale [Member] | Advertising Business [Member]            
Business Acquisition [Line Items]            
Assets and liabilities disposed value           $ 0
Acquired Proprietary Technology and Trade Names [Member]            
Business Acquisition [Line Items]            
Write-off of long-lived assets       3,626    
General and Administrative Expenses [Member]            
Business Acquisition [Line Items]            
Restructuring costs associated with Integration       780    
Information Services [Member] | General and Administrative Expenses [Member]            
Business Acquisition [Line Items]            
Restructuring costs associated with Integration       237    
Performance Marketing [Member] | General and Administrative Expenses [Member]            
Business Acquisition [Line Items]            
Restructuring costs associated with Integration       $ 543    
Trade Names [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets       20 years 20 years  
Proprietary Technology [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets       5 years 5 years  
Domain Names [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets       20 years 20 years  
Q Interactive​, LLC [Member]            
Business Acquisition [Line Items]            
Effective date of business acquisition       Jun. 08, 2016 Jun. 08, 2016  
Business acquisition, common stock issued 2,750,000          
Common stock, par value   $ 0.0005        
Business acquisition, gross revenue earn-out target for contingent consideration   $ 25,000        
Number of common stock applied for additional consideration if the seller chooses fixed shares of common stock, shares   1,200,000        
Earn-out period   1 year        
Number of common stock applied for additional consideration, values   $ 10,000        
Common stock trading days considered to determine volume weighted average price   10 days        
Acquisition consideration payable in stock         $ 10,225  
Weighted average useful life of acquired intangible assets   8 years        
Goodwill   $ 5,384   $ 5,384 $ 5,384  
Q Interactive​, LLC [Member] | Information Services [Member]            
Business Acquisition [Line Items]            
Goodwill   1,765        
Q Interactive​, LLC [Member] | Performance Marketing [Member]            
Business Acquisition [Line Items]            
Goodwill   $ 3,619        
Q Interactive​, LLC [Member] | Customer Relationship [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets   10 years        
Q Interactive​, LLC [Member] | Trade Names [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets   20 years        
Q Interactive​, LLC [Member] | Proprietary Technology [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets   5 years        
Q Interactive​, LLC [Member] | Databases [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets   5 years        
Q Interactive​, LLC [Member] | Non-competition Agreements [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets   2 years        
Q Interactive​, LLC [Member] | Common Stock [Member]            
Business Acquisition [Line Items]            
Business acquisition, common stock issued   2,369,190        
Fluent Acquisition [Member]            
Business Acquisition [Line Items]            
Effective date of business acquisition       Dec. 08, 2015 Dec. 08, 2015  
Common stock, par value     $ 0.0005      
Weighted average useful life of acquired intangible assets     10 years      
Goodwill     $ 155,645 $ 155,645 $ 155,645  
Percentage of outstanding stocks acquired     100.00%      
Fair value of converted common stock     $ 123,800      
Acquisition price, cash     99,266      
Fluent Acquisition [Member] | Information Services [Member]            
Business Acquisition [Line Items]            
Goodwill     37,185      
Fluent Acquisition [Member] | Performance Marketing [Member]            
Business Acquisition [Line Items]            
Goodwill     $ 118,461      
Fluent Acquisition [Member] | Customer Relationship [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets     7 years      
Fluent Acquisition [Member] | Trade Names [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets     20 years      
Fluent Acquisition [Member] | Proprietary Technology [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets     5 years      
Fluent Acquisition [Member] | Databases [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets     10 years      
Fluent Acquisition [Member] | Non-competition Agreements [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets     5 years      
Fluent Acquisition [Member] | Domain Names [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets     20 years      
Fluent Acquisition [Member] | Common Stock [Member]            
Business Acquisition [Line Items]            
Business acquisition, common stock issued     15,001,850