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Redeemable Convertible Preferred Stock (Details) - $ / shares |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Sep. 23, 2019 | Jan. 31, 2019 | Mar. 31, 2019
Common Stock | IPO |  |  |
Temporary Equity [Line Items] |  |  |
Stock issued upon conversion of redeemable convertible preferred shares (in shares) | 7,816,643 |  |
Series G redeemable convertible preferred stock |  |  |
Temporary Equity [Line Items] |  |  |
Sale of temporary equity, price per share (in dollars per share) |  | $ 0.078 | $ 0.078

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