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Marketable Securities (Tables) | 9 Months Ended
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Sep. 30, 2023
Marketable Securities [Abstract] |
Schedule of Marketable Securities | M arketable securities consisted of the following as of the periods presented (in thousands):
| September 30, 2023 |
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |
Marketable Securities |  |  |  |  |  |  |  |
U.S. Treasury securities | $ | 159,288 |  |  | $ | — |  |  | $ | (238) |  |  | $ | 159,050 |  |
U.S. Agency securities | 29,352 |  |  | — |  |  | (22) |  |  | 29,330 |  |
Certificates of deposit | 3,365 |  |  | — |  |  | — |  |  | 3,365 |  |
Corporate debt securities | 1,687 |  |  | — |  |  | (3) |  |  | 1,684 |  |
Commercial paper | 9,513 |  |  | — |  |  | (7) |  |  | 9,506 |  |
Total marketable securities | $ | 203,205 |  |  | $ | — |  |  | $ | (270) |  |  | $ | 202,935 |  |
| December 31, 2022
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Marketable Securities |  |  |  |  |  |  |
U.S. Treasury securities | $ | 219,895 |  |  | $ | 10 |  |  | $ | (801) |  |  | $ | 219,104 |
U.S. Agency securities | 19,247 |  |  | 19 |  |  | (2) |  |  | 19,264 |
Certificates of deposit | 26,624 |  |  | 4 |  |  | (119) |  |  | 26,509 |
Corporate debt securities | 13,934 |  |  | — |  |  | (86) |  |  | 13,848 |
Commercial paper | 22,433 |  |  | 10 |  |  | (43) |  |  | 22,400 |
Total marketable securities | $ | 302,133 |  |  | $ | 43 |  |  | $ | (1,051) |  |  | $ | 301,125 |
Schedule of Marketable Securities in an Unrealized Loss Position | Marketable securities that have been in a continuous unrealized loss position consisted of the following as of the periods presented (in thousands):
| September 30, 2023
| Less Than 12 Months |  | 12 Months or More |  | Total
| Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss
U.S. Treasury securities | $ | 153,622 |  |  | $ | (238) |  |  | $ | — |  |  | $ | — |  |  | $ | 153,622 |  |  | $ | (238) |
U.S. Agency securities | 29,330 |  |  | (22) |  |  | — |  |  | — |  |  | 29,330 |  |  | (22) |
Certificates of deposit | 3,365 |  |  | — |  |  | — |  |  | — |  |  | 3,365 |  |  | — |
Corporate debt securities | 1,684 |  |  | (3) |  |  | — |  |  | — |  |  | 1,684 |  |  | (3) |
Commercial paper | 9,506 |  |  | (7) |  |  | — |  |  | — |  |  | 9,506 |  |  | (7) |
Total | $ | 197,507 |  |  | $ | (270) |  |  | $ | — |  |  | $ | — |  |  | $ | 197,507 |  |  | $ | (270) |
| December 31, 2022
| Less Than 12 Months |  | 12 Months or More |  | Total
| Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss
U.S. Treasury securities | $ | 116,161 |  |  | $ | (151) |  |  | $ | 77,173 |  |  | $ | (650) |  |  | $ | 193,334 |  |  | $ | (801) |
U.S. Agency securities | 3,197 |  |  | (2) |  |  | — |  |  | — |  |  | 3,197 |  |  | (2) |
Certificates of deposit | 22,402 |  |  | (119) |  |  | — |  |  | — |  |  | 22,402 |  |  | (119) |
Corporate debt securities | 4,253 |  |  | (13) |  |  | 8,345 |  |  | (73) |  |  | 12,598 |  |  | (86) |
Commercial paper | 12,853 |  |  | (43) |  |  | — |  |  | — |  |  | 12,853 |  |  | (43) |
Total | $ | 158,866 |  |  | $ | (328) |  |  | $ | 85,518 |  |  | $ | (723) |  |  | $ | 244,384 |  |  | $ | (1,051) |
Schedule of Remaining Contractual Maturities of Marketable Securities | The following summarizes the remaining contractual maturities of the Company’s marketable securities as of September 30, 2023 (in thousands):
| Fair Value
One year or less | $ | 187,079 |
Over one year through five years | 15,856 |
Total marketable securities | $ | 202,935 |

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