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Marketable Securities (Tables) | 12 Months Ended
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Dec. 31, 2023
Marketable Securities |
Schedule of amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities by major security type and class of security |
|  | Amortized cost |  |  | Gross unrealized holding gains |  |  | Gross unrealized holding losses |  |  | Estimated fair value |
December 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US Treasury securities |  | $ | 1,804 |  |  | $ | — |  |  | $ | (1 | ) |  | $ | 1,803 |
Mutual funds |  |  | 1,498 |  |  |  | 7 |  |  |  | — |  |  |  | 1,505 |
Certificates of deposit |  |  | 103 |  |  |  | — |  |  |  | — |  |  |  | 103 |
Corporate debt securities |  |  | 1,007 |  |  |  | — |  |  |  | (22 | ) |  |  | 985 |
Total available-for-sale securities |  | $ | 4,412 |  |  | $ | 7 |  |  | $ | (23 | ) |  | $ | 4,396 |
Schedule of maturities of marketable securities classified as available-for-sale securities |
|  | Amortized cost |  |  | Estimated fair value |
Due within one year |  | $ | 3,497 |  |  | $ | 3,480 |
Due after one year through five years |  |  | 915 |  |  |  | 916 |
Total available-for-sale securities |  | $ | 4,412 |  |  | $ | 4,396 |
Schedule of available-for-sale marketable securities with continuous gross unrealized loss position |
|  | Less than 12 months |  |  | More than 12 months |  |  | Total |
|  | Estimated |  |  | Gross |  |  | Estimated |  |  | Gross |  |  | Estimated |  |  | Gross |
fair value | unrealized | fair value | unrealized | fair value | unrealized
| holding |  | holding |  | holding
| losses |  | losses |  | losses
As of December 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US Treasury Securities |  | $ | 1,803 |  |  | $ | (1 | ) |  |  | - |  |  | $ | - |  |  | $ | 1,803 |  |  | $ | (1 | )
Mutual Funds |  |  | 1,505 |  | - |  |  |  | - |  |  |  | - |  |  |  | 1,505 |  |  |  | - |
Certificates of Deposit |  |  | 103 |  | - |  |  |  | - |  |  |  | - |  |  |  | 103 |  |  |  | - |
Corporate Debt securities |  |  | 985 |  |  |  | (22 | ) |  |  | - |  |  |  | - |  |  |  | 985 |  |  |  | (22 | )
|  | $ | 4,396 |  |  | $ | (23 | ) |  | $ | - |  |  | $ | - |  |  | $ | 4,396 |  |  | $ | (23 | )

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