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Net Loss Per Share - Narrative (Details) - $ / shares shares in Thousands | 9 Months Ended |
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Sep. 30, 2022 | Sep. 30, 2021 | Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares) | 42,013 | 37,662 |
2025 Notes | Convertible Senior Notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Conversion price (in dollars per share) | $ 12.60 |  | $ 12.60
2026 Notes | Convertible Senior Notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Conversion price (in dollars per share) | $ 27.89 |  |
Shares related to convertible senior notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares) | 19,538 | 19,538 |
Shares related to convertible senior notes | 2025 Notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares) | 11,900 |  |
Shares related to convertible senior notes | 2026 Notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares) | 7,600 |  |

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