Convertible Preferred Stock - Schedule of Convertible Preferred Stock (Parenthetical) (Details) $ in Millions	6 Months Ended
Jun. 30, 2019 USD ($)
Series E-1 Convertible Preferred Stock
Temporary Equity [Line Items]
Convertible preferred stock options, vested	$ 0.7

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.

No definition available.

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