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Marketable Securities | 12 Months Ended
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Dec. 31, 2023
Marketable Securities |
Marketable Securities | 2. Marketable Securities The Company has classified its marketable securities as available-for-sale securities. These debt securities are carried at estimated fair value with unrealized holding gains and losses included in accumulated other comprehensive income (loss) in shareholders’ equity until realized. Gains and losses on marketable security transactions are reported on the specific-identification method. Dividend and interest income are recognized when earned. The 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 securities at December 31, 2023 were as follows:
|  | 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 |
Maturities of marketable securities classified as available-for-sale securities were as follows at December 31, 2023:
|  | 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 |
There were no available-for sale securities as of December 31, 2022. Debt securities in an unrealized loss position as of December 31, 2023 were not deemed impaired at acquisition and subsequent declines in fair value are not deemed attributed to declines in credit quality. Management believes that it is more likely than not that the securities will receive a full recovery of par value. The available-for-sale marketable securities in a gross unrealized loss position as of December 31, 2023 are summarized as follows:
|  | 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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