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Common Stock (Tables) | 3 Months Ended
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Mar. 31, 2021
Equity [Abstract] |
Schedule of Common Stock Reserved for Future Issuance | Shares of common stock reserved for future issuance, on an as-if converted basis, are as follows:
| March 31, 2021 |  | December 31, 2020
| (in thousands)
Convertible senior notes | 19,972 |  |  | 19,972 |
Stock options issued and outstanding | 16,833 |  |  | 18,186 |
Remaining shares available for issuance under the 2019 Plan | 39,641 |  |  | 24,539 |
Outstanding and unsettled restricted stock units (RSUs) | 8,447 |  |  | 7,808 |
Shares available for issuance under the ESPP | 8,317 |  |  | 5,230 |
Total shares of common stock reserved | 93,210 |  |  | 75,735 |

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