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Net Loss Per Share - Narrative (Details) - $ / shares | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Stock options |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Anti-dilutive stock options outstanding (in shares) | 894,000 | 951,000
RSU Awards |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Anti-dilutive stock options outstanding (in shares) | 414,000 | 67,000
Convertible Debt Securities | Convertible Notes | Convertible Senior Notes due 2024 |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Anti-dilutive stock options outstanding (in shares) | 638,051 |
Initial conversion price (in dollars per share) | $ 46,403.7000 |
Convertible Debt Securities | Convertible Notes | Convertible Senior Notes Due 2026 |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Anti-dilutive stock options outstanding (in shares) | 3,700,272 |
Initial conversion price (in dollars per share) | $ 30,835.6000 |

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