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CASH EQUIVALENTS AND MARKETABLE SECURITIES - (Tables) | 6 Months Ended
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Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract] |
Marketable Securities | The table below summarizes the Company’s cash equivalents and marketable securities (in thousands):
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
June 30, 2022 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 39,669 |  |  | $ | — |  |  | $ | — |  |  | $ | 39,669 |
Commercial paper securities | 11,340 |  |  | 2 |  |  | (2) |  |  | 11,340 |
Certificates of deposit | 2,498 |  |  | — |  |  | — |  |  | 2,498 |
Total | 53,507 |  |  | 2 |  |  | (2) |  |  | 53,507 |
Marketable securities: |  |  |  |  |  |  |
U.S. government-sponsored entity debt securities | 26,849 |  |  | — |  |  | (424) |  |  | 26,425 |
Commercial paper securities | 109,817 |  |  | 5 |  |  | (455) |  |  | 109,367 |
Corporate debt securities | 10,981 |  |  | — |  |  | (175) |  |  | 10,806 |
Asset-backed securities | 44,710 |  |  | — |  |  | (386) |  |  | 44,324 |
U.S. treasury bills | 12,008 |  |  | — |  |  | — |  |  | 12,008 |
Certificate of deposits | 43,148 |  |  | 2 |  |  | (96) |  |  | 43,054 |
Total | 247,513 |  |  | 7 |  |  | (1,536) |  |  | 245,984 |
Total cash equivalents and marketable securities | $ | 301,020 |  |  | $ | 9 |  |  | $ | (1,538) |  |  | $ | 299,491 |
December 31, 2021 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 119,919 |  |  | $ | — |  |  | $ | — |  |  | $ | 119,919 |
Total | 119,919 |  |  | — |  |  | — |  |  | 119,919 |
Marketable securities: |  |  |  |  |  |  |
U.S. government-sponsored entity debt securities | 30,700 |  |  | 1 |  |  | (87) |  |  | 30,614 |
Commercial paper securities | 105,792 |  |  | 7 |  |  | (42) |  |  | 105,757 |
Corporate debt securities | 33,723 |  |  | 1 |  |  | (42) |  |  | 33,682 |
Asset-backed securities | 70,807 |  |  | 1 |  |  | (107) |  |  | 70,701 |
Certificate of deposits | 45,116 |  |  | 1 |  |  | (26) |  |  | 45,091 |
Total | 286,138 |  |  | 11 |  |  | (304) |  |  | 285,845 |
Total cash equivalents and marketable securities | $ | 406,057 |  |  | $ | 11 |  |  | $ | (304) |  |  | $ | 405,764 |
Fair value of investments available-for-sale | The fair value of marketable securities by contractual maturity were as follows (in thousands):
| June 30, 2022 |  | December 31, 2021
Maturing in one year or less | $ | 211,855 |  |  | $ | 197,676 |
Maturing after one year through five years | 47,966 |  |  | 88,169 |
Total | $ | 259,821 |  |  | $ | 285,845 |

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