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CASH EQUIVALENTS AND MARKETABLE SECURITIES - (Tables) | 3 Months Ended
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Mar. 31, 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
March 31, 2022 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 49,827 |  |  | $ | — |  |  | $ | — |  |  | $ | 49,827 |
U.S. government-sponsored entity debt securities | 15,009 |  |  |  |  | (1) |  |  | 15,008 |
Total | 64,836 |  |  | — |  |  | (1) |  |  | 64,835 |
Marketable securities: |  |  |  |  |  |  |
U.S. government-sponsored entity debt securities | 24,788 |  |  | — |  |  | (347) |  |  | 24,441 |
Commercial paper securities | 117,709 |  |  | — |  |  | (384) |  |  | 117,325 |
Corporate debt securities | 17,522 |  |  | — |  |  | (149) |  |  | 17,373 |
Asset-backed securities | 67,890 |  |  | — |  |  | (375) |  |  | 67,515 |
U.S. treasury bills | 2,995 |  |  | — |  |  | — |  |  | 2,995 |
Certificate of deposits | 50,526 |  |  | — |  |  | (121) |  |  | 50,405 |
Total | 281,430 |  |  | — |  |  | (1,376) |  |  | 280,054 |
Total cash equivalents and marketable securities | $ | 346,266 |  |  | $ | — |  |  | $ | (1,377) |  |  | $ | 344,889 |
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):
| March 31, 2022 |  | December 31, 2021
Maturing in one year or less | $ | 212,547 |  |  | $ | 197,676 |
Maturing after one year through five years | 82,515 |  |  | 88,169 |
Total | $ | 295,062 |  |  | $ | 285,845 |

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