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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2022
Fair Value Measurements |
Cash and cash equivalents, marketable securities and restricted cash | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2022
(in thousands) |  | Cost |  | Unrealized Gain |  | Unrealized (Loss) |  | Fair Value
Money market funds | ​ | $ | 55,060 | ​ | $ | — | ​ | $ | — | ​ | $ | 55,060
U.S. government agency securities | ​ | ​ | 19,929 |  | ​ | 35 | ​ | ​ | — | ​ | ​ | 19,964
U.S. treasury securities | ​ | ​ | 68,431 | ​ | ​ | 8 | ​ | ​ | (21) | ​ | ​ | 68,418
Commercial paper and corporate notes | ​ | ​ | 48,203 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 48,203
Total | ​ | $ | 191,623 |  | $ | 43 | ​ | $ | (21) | ​ | $ | 191,645
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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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