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v3.22.2

Short-Term Investments (Tables) | 6 Months Ended
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Jun. 30, 2022
Short-Term Investments |
Schedule of short term investments | The following table summarizes the short-term investments held at June 30, 2022 and December 31, 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross Unrealized |  | Gross Unrealized |  | ​ | ​
​ | ​ | Amortized Cost | ​ | Gains | ​ | Losses | ​ | Fair Value
June 30, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate debt securities | ​ | $ | 23,808 | ​ | $ | — | ​ | $ | (123) | ​ | $ | 23,685
Commercial paper | ​ | ​ | 8,991 | ​ | ​ | — | ​ | ​ | (7) | ​ | ​ | 8,984
Yankee securities | ​ | ​ | 7,039 | ​ | ​ | — | ​ | ​ | (41) | ​ | ​ | 6,998
U.S. agency bonds | ​ | ​ | 3,000 | ​ | ​ | — | ​ | ​ | (15) | ​ | ​ | 2,985
Reverse repurchase agreements | ​ | ​ | 30,000 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 30,000
Total | ​ | $ | 72,838 | ​ | $ | — | ​ | $ | (186) | ​ | $ | 72,652
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross Unrealized | ​ | Gross Unrealized | ​ | ​ | ​
​ |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reverse repurchase agreements | ​ | $ | 39,000 | ​ | $ | — | ​ | $ | — | ​ | $ | 39,000
Total | ​ | $ | 39,000 | ​ | $ | — | ​ | $ | — | ​ | $ | 39,000
​

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