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v3.21.1

Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2021
Summary of Significant Accounting Policies [Abstract] |
Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis |
| March 31, 2021 |  | December 31, 2020
(in thousands) | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and money market funds | $ | 906,453 |  | $ | — |  | $ | — |  | $ | 906,453 |  | $ | 43,040 |  | $ | — |  | $ | — |  | $ | 43,040
Commercial paper |  | — |  |  | 25,945 |  |  | — |  |  | 25,945 |  |  | — |  |  | 32,537 |  |  | — |  |  | 32,537
U.S. government & agency securities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 170 |  |  | — |  |  | 170
U.S. Treasury security |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 5,864 |  |  | — |  |  | 5,864
Total cash and cash equivalents |  | 906,453 |  |  | 25,945 |  |  | — |  |  | 932,398 |  |  | 43,040 |  |  | 38,571 |  |  | — |  |  | 81,611
Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | — |  |  | 75,465 |  |  | — |  |  | 75,465 |  |  | — |  |  | 112,644 |  |  | — |  |  | 112,644
Corporate debt securities |  | — |  |  | 15,548 |  |  | — |  |  | 15,548 |  |  | — |  |  | 17,456 |  |  | — |  |  | 17,456
U.S. government & agency securities |  | — |  |  | 136,908 |  |  | — |  |  | 136,908 |  |  | — |  |  | 107,103 |  |  | — |  |  | 107,103
Total investments |  | — |  |  | 227,921 |  |  | — |  |  | 227,921 |  |  | — |  |  | 237,203 |  |  | — |  |  | 237,203
Short-term restricted cash: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | 836 |  |  | — |  |  | — |  |  | 836 |  |  | 836 |  |  | — |  |  | — |  |  | 836
Long-term restricted cash: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | 3,500 |  |  | — |  |  | — |  |  | 3,500 |  |  | 3,500 |  |  | — |  |  | — |  |  | 3,500
Total assets measured at fair value | $ | 910,789 |  | $ | 253,866 |  | $ | — |  | $ | 1,164,655 |  | $ | 47,376 |  | $ | 275,774 |  | $ | — |  | $ | 323,150
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuation Advances | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | —
Total liabilities measured at fair value | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | —
Computation of Basic and Diluted Net Income (Loss) per Share |
|  | Three Months Ended March 31,
|  | 2021 |  | 2020
Net income (loss) |  | $ | (87,435) |  | $ | 1,262
Basic |  |  |  |  |  |
Weighted average shares used in computing basic net income (loss) per share |  |  | 194,790 |  |  | 153,453
Basic net income (loss) per share |  | $ | (0.45) |  | $ | 0.01
Diluted |  |  |  |  |  |
Weighted average shares used in computing basic net income (loss) per share |  |  | 194,790 |  |  | 153,453
Add: weighted average stock options |  |  | — |  |  | 1,926
Add: weighted average restricted stock units |  |  | — |  |  | 476
Weighted average shares used in computing diluted net income (loss) per share |  |  | 194,790 |  |  | 155,855
Diluted net income (loss) per share |  | $ | (0.45) |  | $ | 0.01
Anti-dilutive Shares Excluded from Computation of Diluted Net Income (Loss) per Share |
|  | Three Months Ended March 31,
(in thousands) |  | 2021 |  | 2020
Shares issuable upon conversion of convertible senior notes |  | 20,690 |  | —
Options to purchase common stock |  | 12,332 |  | 14,265
RSUs with time-based vesting |  | 6,527 |  | 2,208
RSUs with performance-based vesting |  | — |  | 138
ESPP shares |  | — |  | 1,346

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