Short-term investments as of September 30, 2024, consist of the following (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | Adjusted
Cost | | Unrealized
Gains | | Unrealized
Losses | | Fair
Value | | U.S. Treasury bills | $ | 58,951 | | | $ | 229 | | | $ | — | | | $ | 59,180 | | | Corporate bonds | 26,495 | | | 14 | | | — | | | 26,509 | | | Government and government agency | 2,860 | | | 4 | | | — | | | 2,864 | | | Total short-term investments | $ | 88,306 | | | $ | 247 | | | $ | — | | | $ | 88,553 | |
Short-term investments as of December 31, 2023, consist of the following (in thousands):
| | | | | | | | | | | | | | | | | | | | | | | | | Adjusted
Cost | | Unrealized
Gains | | Unrealized
Losses | | Fair
Value | | U.S. Treasury bills | $ | 63,809 | | | $ | 24 | | | $ | — | | | $ | 63,833 | | | Corporate bonds | 39,152 | | | 18 | | | (1) | | | 39,169 | | | Government and government agency | 20,624 | | | — | | | (14) | | | 20,610 | | | Asset-backed bonds | 705 | | | 1 | | | — | | | 706 | | | Total short-term investments | $ | 124,290 | | | $ | 43 | | | $ | (15) | | | $ | 124,318 | |
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