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Capitalization - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Sep. 30, 2019 | Aug. 31, 2019 | Jan. 31, 2019 | Sep. 30, 2019
Warrants |  |  |  |
Sale of Stock, Number of Shares Issued in Transaction | 2,475,248 |  | 7,563,725 | 63,926
Sale of Stock, Price Per Share | $ 46.60 |  | $ 30.20 | $ 46.60
Sale of Stock, Consideration Received on Transaction | $ 97.0 |  | $ 224.2 | $ 2.6
Over-Allotment Option |  |  |  |
Warrants |  |  |  |
Sale of Stock, Number of Shares Issued in Transaction | 371,287 |  | 843,725 |
Maximum |  |  |  |
Warrants |  |  |  |
Sale of Stock, Consideration Received on Transaction |  | $ 125.0 |  |
Common stock |  |  |  |
Warrants |  |  |  |
Sale of Stock, Price Per Share | $ 40.40 |  |  | $ 40.40

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