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v3.23.3

Investments (Tables) | 9 Months Ended
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Sep. 30, 2023
Investments |
Schedule of securities classified as held-to-maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | (in thousands)
Corporate and agency bonds (due within 1 year) | ​ | $ | 32,313 | ​ | $ | — | ​ | $ | (23) | ​ | $ | 32,290
Corporate bonds (due within 1 to 3 years) | ​ | ​ | 964 | ​ | ​ | — | ​ | ​ | (1) | ​ | ​ | 963
Municipal bonds (due within 1 year) | ​ | ​ | 379 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 379
Total investments as of September 30, 2023 | ​ | $ | 33,656 | ​ | $ | — | ​ | $ | (24) | ​ | $ | 33,632
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate and agency bonds (due within 1 year) | ​ | $ | 21,612 | ​ | $ | — | ​ | $ | (60) | ​ | $ | 21,552
Municipal bonds (due within 1 year) | ​ | ​ | 1,903 | ​ | ​ | — | ​ | ​ | (2) | ​ | ​ | 1,901
Total investments as of December 31, 2022 | ​ | $ | 23,515 | ​ | $ | — | ​ | $ | (62) | ​ | $ | 23,453

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