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Stockholders' Equity - Summary of Recognized Share-based Compensation Cost (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |
Share-based compensation (Income) expense | $ 273,198 | $ 58,983
Selling, General and Administrative [Member] |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |
Share-based compensation (Income) expense | 213,807 | 120,850
Research and Development [Member] |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |
Share-based compensation (Income) expense | $ 59,391 | $ (61,867)

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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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- Details
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