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Investments in Securities | 12 Months Ended
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Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract] |
Investments in Securities | 10. Investments in Securities The cost and fair value of marketable securities are as follows:
| December 31, 2023
(in thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. treasury bills | $ | 60,801 |  |  | $ | 131 |  |  | $ | — |  |  | $ | 60,932 |
Municipal bonds | 9,543 |  |  | 148 |  |  | (404) |  |  | 9,287 |
Corporate/government bonds | 477 |  |  | 29 |  |  | — |  |  | 506 |
Other bonds | 478 |  |  | 27 |  |  | — |  |  | 505 |
| $ | 71,299 |  |  | $ | 335 |  |  | $ | (404) |  |  | $ | 71,230 |
| December 31, 2022
(in thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. treasury bills | $ | 59,764 |  |  | $ | 319 |  |  | $ | — |  |  | $ | 60,083 |
Municipal bonds | 9,205 |  |  | 40 |  |  | (838) |  |  | 8,407 |
Corporate/government bonds | 477 |  |  | — |  |  | — |  |  | 477 |
Other bonds | 478 |  |  | 3 |  |  | — |  |  | 481 |
| $ | 69,924 |  |  | $ | 362 |  |  | $ | (838) |  |  | $ | 69,448 |
The aggregated unrealized losses on available-for-sale debt securities in the amounts of $69 and $476 have been recognized in accumulated other comprehensive loss in the Company’s consolidated balance sheets as of December 31, 2023 and December 31, 2022, respectively.

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