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Marketable Debt Securities | 6 Months Ended
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Jun. 30, 2021
Investments Debt And Equity Securities [Abstract] |
Marketable Debt Securities | 5. Marketable Debt Securities The Company had no marketable debt securities as of June 30, 2021. The following table summarizes the Company’s marketable debt securities as of December 31, 2020 (in thousands):
|  | December 31, 2020 |
|  | Amortized Cost |  |  | Unrealized Losses |  |  | Unrealized Gains |  |  | Fair Value |
Asset-backed securities |  | $ | 7,507 |  |  | $ | — |  |  | $ | 15 |  |  | $ | 7,522 |
Corporate debt securities |  |  | 1,754 |  |  |  | — |  |  |  | 8 |  |  |  | 1,762 |
Commercial paper |  |  | 999 |  |  |  | — |  |  |  | 1 |  |  |  | 1,000 |
Total |  | $ | 10,260 |  |  | $ | — |  |  | $ | 24 |  |  | $ | 10,284 |
The following table summarizes the classification of the Company’s marketable debt securities in the consolidated balance sheets (in thousands):
|  | June 30, |  |  | December 31, |
|  | 2021 |  |  | 2020 |
Short-term marketable debt securities |  |  | — |  |  |  | 10,284 |
Long-term marketable debt securities |  |  | — |  |  |  | — |
Total |  | $ | — |  |  | $ | 10,284 |

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