| Schedule of Investment Securities |
Investment securities consisted of the following (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2024 | | Amortized
Cost | | Unrealized
Gains | | Unrealized
(Losses) | | Estimated
Fair
Value | | U.S. Government Agency Securities | $ | 135,801 | | | $ | 158 | | | $ | (13) | | | $ | 135,946 | | | FDIC Certificates of Deposit | 980 | | | — | | | — | | | 980 | | | Certificates of Deposit | 60,000 | | | — | | | — | | | 60,000 | | | Commercial Paper | 51,637 | | | 63 | | | (1) | | | 51,699 | | | Corporate Notes/Bonds | 315,499 | | | 1,453 | | | (31) | | | 316,921 | | | $ | 563,917 | | | $ | 1,674 | | | $ | (45) | | | $ | 565,546 | |
| | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2023 | | Amortized
Cost | | Unrealized
Gains | | Unrealized
(Losses) | | Estimated
Fair
Value | | U.S. Government Agency Securities | $ | 150,651 | | | $ | 148 | | | $ | (204) | | | $ | 150,595 | | | FDIC Certificates of Deposit | 4,410 | | | 2 | | | (12) | | | 4,400 | | | Certificates of Deposit | 60,000 | | | — | | | — | | | 60,000 | | | Commercial Paper | 78,610 | | | 59 | | | (27) | | | 78,642 | | | Corporate Notes/Bonds | 118,899 | | | 281 | | | (143) | | | 119,037 | | | $ | 412,570 | | | $ | 490 | | | $ | (386) | | | $ | 412,674 | |
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