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Marketable Securities (Tables) | 12 Months Ended
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Dec. 31, 2023
Marketable Securities |
Schedule of marketable securities | Marketable securities consist of the following:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Estimated
(in thousands) |  | Cost |  | Gain |  | Loss |  | Fair Value
Corporate bonds | ​ | $ | 73,334 | ​ | $ | 36 | ​ | $ | (210) | ​ | $ | 73,160
U.S. Treasury and Government agencies | ​ | ​ | 22,105 | ​ | ​ | 5 | ​ | ​ | (53) | ​ | ​ | 22,057
Total | ​ | $ | 95,439 | ​ | $ | 41 | ​ | $ | (263) | ​ | $ | 95,217
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2022
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Estimated
(in thousands) |  | Cost |  | Gain |  | Loss |  | Fair Value
Corporate bonds | ​ | $ | 133,163 | ​ | $ | — | ​ | $ | (1,457) | ​ | $ | 131,706
U.S. Treasury and Government agencies | ​ | ​ | 1,612 | ​ | ​ | — | ​ | ​ | (37) | ​ | ​ | 1,575
Total | ​ | $ | 134,775 | ​ | $ | — | ​ | $ | (1,494) | ​ | $ | 133,281
Schedule of available-for-sale maturities | The following table summarizes maturities of the Company’s investments available-for-sale as of December 31, 2023:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023
​ | ​ | ​ | ​ | ​ | Fair
(in thousands) |  | Cost |  | Value
Maturities: | ​ | ​ | ​ | ​ | ​ | ​
Within 1 year | ​ | $ | 92,512 | ​ | $ | 92,268
Between 1 to 2 years | ​ |  | 2,927 | ​ |  | 2,949
Total investments available-for-sale | ​ | $ | 95,439 | ​ | $ | 95,217

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