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Common Stock (Tables) | 6 Months Ended
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Jun. 30, 2020
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:
| June 30, 2020 |  | December 31, 2019
| (in thousands) |  |
Convertible senior notes | 19,972 |  |  | — |
Stock options issued and outstanding | 20,085 |  |  | 21,191 |
Remaining shares available for issuance under the 2019 Plan | 26,289 |  |  | 29,048 |
Outstanding and unsettled restricted stock units (RSUs) | 7,158 |  |  | 7,175 |
Shares available for issuance under the ESPP | 5,449 |  |  | 5,870 |
Total shares of common stock reserved | 78,953 |  |  | 63,284 |

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