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v3.21.1

Investments (Tables) | 3 Months Ended
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Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Summary of Investments Classified as Available-For-Sale | Our investments, which are all classified as available-for-sale, consisted of the following:
|  | As of March 31, 2021
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | (in thousands)
Description: |  |  |  |  |  |  |  |
U.S. government agencies |  | 55,388 |  |  | 5 |  |  | — |  |  | 55,393 |
Commercial paper |  | 27,676 |  |  | — |  |  | — |  |  | 27,676 |
Corporate bonds |  | 27,648 |  |  | 16 |  |  | (7) |  |  | 27,657 |
Asset-backed securities |  | 2,403 |  |  | — |  |  | — |  |  | 2,403 |
Total |  | $ | 113,115 |  |  | $ | 21 |  |  | $ | (7) |  |  | $ | 113,129 |
|  | As of December 31, 2020
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | (in thousands)
Description: |  |  |  |  |  |  |  |
U.S. government agencies |  | $ | 83,596 |  |  | $ | 3 |  |  | $ | (12) |  |  | $ | 83,587 |
Corporate bonds |  | 24,162 |  |  | 31 |  |  | (1) |  |  | 24,192 |
Commercial paper |  | 34,766 |  |  | — |  |  | — |  |  | 34,766 |
Agency bonds |  | 3,998 |  |  | 1 |  |  | — |  |  | 3,999 |
Asset-backed securities |  | 2,419 |  |  | — |  |  | — |  |  | 2,419 |
Total |  | $ | 148,941 |  |  | $ | 35 |  |  | $ | (13) |  |  | $ | 148,963 |

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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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