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Investment in equity securities - Additional Information (Details) $ in Millions | Apr. 14, 2017 USD ($)
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Social Media Analytics Company |
Debt and Equity Securities, FV-NI [Line Items] |
Amount invested | $ 2.9

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- Definition Equity Securities without Readily Determinable Fair Value, Original Cost + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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