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Marketable Securities and Long-Term Investments (Tables) | 6 Months Ended
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Jun. 30, 2021
Investments Debt And Equity Securities [Abstract] |
Summary of Marketable Securities and Long-Term Investments Held | The following table summarizes the Company’s marketable securities and long-term investments held at June 30, 2021 (in thousands):
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Commercial paper |  | $ | 375,665 |  |  | $ | 41 |  |  | $ | (7 | ) |  | $ | 375,699 |
Corporate notes |  |  | 27,568 |  |  |  | — |  |  |  | (3 | ) |  |  | 27,565 |
Total |  | $ | 403,233 |  |  | $ | 41 |  |  | $ | (10 | ) |  | $ | 403,264 |
The following table summarizes the Company’s marketable securities held at December 31, 2020 (in thousands):
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Commercial paper |  | $ | 113,628 |  |  | $ | 11 |  |  | $ | (17 | ) |  | $ | 113,622 |
Corporate notes |  |  | 7,839 |  |  |  | 2 |  |  |  | (5 | ) |  |  | 7,836 |
U.S Treasury securities |  |  | 11,009 |  |  |  | — |  |  |  | — |  |  |  | 11,009 |
Government securities |  |  | 5,033 |  |  |  | — |  |  |  | — |  |  |  | 5,033 |
Total |  | $ | 137,509 |  |  | $ | 13 |  |  | $ | (22 | ) |  | $ | 137,500 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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