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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 |  |  |

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