Cash equivalents and marketable securities consisted of the following at September 30, 2024 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Amortized
Cost | | Allowance
for Credit
Losses | | Gross
Unrealized
Gains | | Gross
Unrealized
Losses | | Fair
Value | | Cash equivalents and marketable securities: | | | | | | | | | | | | Government agency securities | | $ | 13,999 | | | $ | — | | | $ | — | | | $ | (26) | | | $ | 13,973 | | | U.S. Treasuries | | 148,228 | | | — | | | 553 | | | — | | | 148,781 | | | Money market funds | | 95,832 | | | — | | | — | | | — | | | 95,832 | | | Corporate notes/bonds | | 6,507 | | | — | | | — | | | (5) | | | 6,502 | | | | | | | | | | | | | | Total | | $ | 264,566 | | | $ | — | | | $ | 553 | | | $ | (31) | | | $ | 265,088 | |
Cash equivalents and marketable securities consisted of the following at December 31, 2023 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Amortized
Cost | | Allowance
for Credit
Losses | | Gross
Unrealized
Gains | | Gross
Unrealized
Losses | | Fair
Value | | Cash equivalents and marketable securities: | | | | | | | | | | | | Government agency securities | | $ | 103,507 | | | $ | — | | | $ | — | | | $ | (327) | | | $ | 103,180 | | | Money market funds | | 123,652 | | | — | | | — | | | — | | | 123,652 | | | Corporate notes/bonds | | 30,920 | | | — | | | — | | | (86) | | | 30,834 | | | U.S. Treasuries | | 168,858 | | | — | | | 611 | | | — | | | 169,469 | | | | | | | | | | | | | | Total | | $ | 426,937 | | | $ | — | | | $ | 611 | | | $ | (413) | | | $ | 427,135 | |
|