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v3.19.1

Property and Equipment, Net - Property and Equipment, Net by Geographic Area (Parenthetical) (Details) - Country | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Geographic Concentrations | Property and Equipment Net | Rest of World |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Number of individual country exceeded 10% of total property and equipment | 0 | 0

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- Details
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- Details
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- Details
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