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Cash Equivalents and Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2024
Cash and Cash Equivalents [Abstract] |
Schedule of Fair Value and Amortized Cost of Cash Equivalents | The fair value and amortized cost of cash equivalents and fixed income marketable securities by major security type are as follows (in thousands):
| March 31, 2024
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Money market funds | $ | 50,808 |  |  | $ | — |  |  | $ | — |  |  | $ | 50,808 |
U.S. Treasury securities | 343,389 |  |  | 2 |  |  | (197) |  |  | 343,194 |
U.S. government agency securities | 38,566 |  |  | — |  |  | (139) |  |  | 38,427 |
Corporate debt securities | 68,752 |  |  | — |  |  | (70) |  |  | 68,682 |
Total cash equivalents and fixed income marketable securities | $ | 501,515 |  |  | $ | 2 |  |  | $ | (406) |  |  | $ | 501,111 |
Classified as: | Fair Value
Cash equivalents | $ | 101,996 |
Marketable securities | 399,115 |
Marketable securities, non-current | — |
Total cash equivalents and fixed income marketable securities | $ | 501,111 |
| December 31, 2023
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Money market funds | $ | 62,075 |  |  | $ | — |  |  | $ | — |  |  | $ | 62,075 |
U.S. Treasury securities | 374,214 |  |  | 237 |  |  | (95) |  |  | 374,356 |
U.S. government agency securities | 48,924 |  |  | 3 |  |  | (177) |  |  | 48,750 |
Corporate debt securities | 59,668 |  |  | — |  |  | (62) |  |  | 59,606 |
Total cash equivalents and fixed income marketable securities | $ | 544,881 |  |  | $ | 240 |  |  | $ | (334) |  |  | $ | 544,787 |
Classified as: | Fair Value
Cash equivalents | $ | 127,705 |
Marketable securities | 400,576 |
Marketable securities, non-current | 16,506 |
Total cash equivalents and fixed income marketable securities | $ | 544,787 |
Schedule of Fair Value and Amortized Cost of Marketable Securities | The fair value and amortized cost of cash equivalents and fixed income marketable securities by major security type are as follows (in thousands):
| March 31, 2024
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Money market funds | $ | 50,808 |  |  | $ | — |  |  | $ | — |  |  | $ | 50,808 |
U.S. Treasury securities | 343,389 |  |  | 2 |  |  | (197) |  |  | 343,194 |
U.S. government agency securities | 38,566 |  |  | — |  |  | (139) |  |  | 38,427 |
Corporate debt securities | 68,752 |  |  | — |  |  | (70) |  |  | 68,682 |
Total cash equivalents and fixed income marketable securities | $ | 501,515 |  |  | $ | 2 |  |  | $ | (406) |  |  | $ | 501,111 |
Classified as: | Fair Value
Cash equivalents | $ | 101,996 |
Marketable securities | 399,115 |
Marketable securities, non-current | — |
Total cash equivalents and fixed income marketable securities | $ | 501,111 |
| December 31, 2023
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Money market funds | $ | 62,075 |  |  | $ | — |  |  | $ | — |  |  | $ | 62,075 |
U.S. Treasury securities | 374,214 |  |  | 237 |  |  | (95) |  |  | 374,356 |
U.S. government agency securities | 48,924 |  |  | 3 |  |  | (177) |  |  | 48,750 |
Corporate debt securities | 59,668 |  |  | — |  |  | (62) |  |  | 59,606 |
Total cash equivalents and fixed income marketable securities | $ | 544,881 |  |  | $ | 240 |  |  | $ | (334) |  |  | $ | 544,787 |
Classified as: | Fair Value
Cash equivalents | $ | 127,705 |
Marketable securities | 400,576 |
Marketable securities, non-current | 16,506 |
Total cash equivalents and fixed income marketable securities | $ | 544,787 |

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