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v3.23.2

Marketable Securities (Tables) | 6 Months Ended
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Jun. 30, 2023
Marketable Securities |
Schedule of marketable debt securities, classified as available-for-sale | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Gross Unrealized | ​ | Gross Unrealized | ​ | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | (In thousands)
June 30, 2023 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Marketable securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government and municipal obligations | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Maturing in one year or less | ​ | $ | 96,632 | ​ | $ | — | ​ | $ | (268) | ​ | $ | 96,364
Maturing after one year through three years | ​ | ​ | 10,716 | ​ | ​ | — | ​ | ​ | (34) | ​ | ​ | 10,682
Total U.S. government and municipal obligations | ​ | $ | 107,348 | ​ | $ | — | ​ | $ | (302) | ​ | $ | 107,046
Corporate debt securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Maturing in one year or less | ​ | $ | 73,263 | ​ | $ | 1 | ​ | $ | (144) | ​ | $ | 73,120
Maturing after one year through three years | ​ | ​ | 44,387 | ​ | ​ | 1 | ​ | ​ | (81) | ​ | ​ | 44,307
Total corporate debt securities | ​ | $ | 117,650 | ​ | $ | 2 | ​ | $ | (225) | ​ | $ | 117,427
Total marketable securities | ​ | $ | 224,998 | ​ | $ | 2 | ​ | $ | (527) | ​ | $ | 224,473
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Gross Unrealized | ​ | Gross Unrealized | ​ | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | (In thousands)
December 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Marketable securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government and municipal obligations | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Maturing in one year or less | ​ | $ | 97,246 | ​ | $ | 5 | ​ | $ | (369) | ​ | $ | 96,882
Maturing after one year through three years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total U.S. government and municipal obligations | ​ | $ | 97,246 | ​ | $ | 5 | ​ | $ | (369) | ​ | $ | 96,882
Corporate debt securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Maturing in one year or less | ​ | $ | 179,613 | ​ | $ | — | ​ | $ | (972) | ​ | $ | 178,641
Maturing after one year through three years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total corporate debt securities | ​ | $ | 179,613 | ​ | $ | — | ​ | $ | (972) | ​ | $ | 178,641
Total marketable securities | ​ | $ | 276,859 | ​ | $ | 5 | ​ | $ | (1,341) | ​ | $ | 275,523

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