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Cash Equivalents and Marketable Securities | 3 Months Ended
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Mar. 31, 2024
Cash Equivalents and Marketable Securities [Abstract] |
Cash Equivalents and Marketable Securities | 3. Cash Equivalents and Marketable Securities The following tables summarize the amortized cost and fair value of the Company’s cash equivalents and marketable securities by major investment category for the periods indicated:
|  | March 31, 2024 |
|  | Amortized Cost |  |  | Gross Unrealized Gain |  |  | Gross Unrealized Loss |  |  | Estimated Fair Value |
|  | (in thousands) |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 142,817 |  |  | $ | — |  |  | $ | — |  |  | $ | 142,817 |
Total cash equivalents |  | $ | 142,817 |  |  | $ | — |  |  | $ | — |  |  | $ | 142,817 |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 69,612 |  |  | $ | 1 |  |  | $ | (36 | ) |  | $ | 69,577 |
Certificates of deposit |  |  | 11,669 |  |  |  | 3 |  |  |  | (1 | ) |  |  | 11,671 |
U.S. government and agency debt securities |  |  | 122,660 |  |  |  | — |  |  |  | (108 | ) |  |  | 122,552 |
Corporate debt securities |  |  | 36,297 |  |  |  | 5 |  |  |  | (12 | ) |  |  | 36,290 |
Total marketable securities |  |  | 240,238 |  |  |  | 9 |  |  |  | (157 | ) |  |  | 240,090 |
Total cash equivalents and marketable securities |  | $ | 383,055 |  |  | $ | 9 |  |  | $ | (157 | ) |  | $ | 382,907 |
|  | December 31, 2023 |
|  | Amortized Cost |  |  | Gross Unrealized Gain |  |  | Gross Unrealized Loss |  |  | Estimated Fair Value |
|  | (in thousands) |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 306,801 |  |  | $ | — |  |  | $ | — |  |  | $ | 306,801 |
Commercial paper |  |  | 42,455 |  |  |  | 6 |  |  |  | — |  |  |  | 42,461 |
U.S. government and agency debt securities |  |  | 12,998 |  |  |  | — |  |  |  | (6 | ) |  |  | 12,992 |
Total cash equivalents |  | $ | 362,254 |  |  | $ | 6 |  |  | $ | (6 | ) |  | $ | 362,254 |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 47,534 |  |  | $ | 17 |  |  | $ | (4 | ) |  | $ | 47,547 |
U.S. government and agency debt securities |  |  | 37,515 |  |  |  | — |  |  |  | (91 | ) |  |  | 37,424 |
Corporate debt securities |  |  | 4,816 |  |  |  | 3 |  |  |  | (1 | ) |  |  | 4,818 |
Total marketable securities |  |  | 89,865 |  |  |  | 20 |  |  |  | (96 | ) |  |  | 89,789 |
Total cash equivalents and marketable securities |  | $ | 452,119 |  |  | $ | 26 |  |  | $ | (102 | ) |  | $ | 452,043 |
The Company’s marketable securities by contractual maturity were (in thousands):
|  | March 31, 2024 |
Within one year |  | $ | 239,788 |
After one year through two years |  |  | 302 |
Total marketable securities |  | $ | 240,090 |
As of March 31, 2024, the Company has not realized any material gains or losses on its marketable securities, including any impairment charges on its securities related to expected credit losses. As of March 31, 2024, the aggregate difference between the amortized cost and fair value of each security in an unrealized loss position was de minimis. Since any provision for expected credit losses for a security held is limited to the amount the fair value is less than its amortized cost, no allowance for expected credit loss was deemed necessary at March 31, 2024 (see Note 4).

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- Definition Cash equivalents and marketable securities. + References No definition available. + Details
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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//320/tableOfContent + Details
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