| Marketable Securities |
4. Marketable Securities Marketable securities consisted of available-for-sale securities as follows (in thousands):
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As of June 30, 2025 |
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Estimated |
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Amortized |
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Unrealized |
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Unrealized |
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Fair |
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Cost |
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Gain |
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Loss |
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Value |
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Short-term marketable securities: |
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Corporate bonds |
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$ |
35,127 |
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$ |
20 |
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$ |
(4 |
) |
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$ |
35,143 |
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U.S. Treasury securities |
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26,860 |
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20 |
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(2 |
) |
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26,878 |
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Total short-term marketable securities |
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$ |
61,987 |
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$ |
40 |
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|
$ |
(6 |
) |
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$ |
62,021 |
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Long-term marketable securities: |
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Corporate bonds |
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$ |
69,676 |
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$ |
193 |
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$ |
(3 |
) |
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$ |
69,866 |
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U.S. Treasury securities |
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20,242 |
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|
103 |
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— |
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20,345 |
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U.S. government agency debt securities |
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12,500 |
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1 |
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(10 |
) |
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12,491 |
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Total long-term marketable securities |
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$ |
102,418 |
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$ |
297 |
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$ |
(13 |
) |
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$ |
102,702 |
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As of December 31, 2024 |
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Estimated |
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Amortized |
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Unrealized |
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Unrealized |
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Fair |
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Cost |
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Gain |
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Loss |
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Value |
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Short-term marketable securities: |
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Corporate bonds |
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$ |
33,519 |
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$ |
23 |
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|
$ |
(5 |
) |
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$ |
33,537 |
|
U.S. Treasury securities |
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|
30,130 |
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27 |
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(4 |
) |
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30,153 |
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Total short-term marketable securities |
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$ |
63,649 |
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|
$ |
50 |
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|
$ |
(9 |
) |
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$ |
63,690 |
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Long-term marketable securities: |
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Corporate bonds |
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$ |
33,982 |
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$ |
16 |
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$ |
(43 |
) |
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$ |
33,955 |
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U.S. Treasury securities |
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24,146 |
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23 |
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(15 |
) |
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24,154 |
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U.S. government agency debt securities |
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|
3,500 |
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1 |
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— |
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|
3,501 |
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Total long-term marketable securities |
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$ |
61,628 |
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$ |
40 |
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|
$ |
(58 |
) |
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$ |
61,610 |
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