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Goodwill - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 31, 2016 | Jun. 30, 2016 | Jun. 30, 2016
Sproutling Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Consideration paid for business acquisition |  |  | $ 9.9
Duration of contingent consideration agreement | 3 years |  |
Fuhu Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Consideration paid for business acquisition |  |  | 23.1
Fuhu Inc. and Sproutling Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Integration costs recognized |  | $ 0.5 | $ 1.1

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