XML 35 R26.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Short-Term Investments (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2022
Short-Term Investments |
Summary of the short-term investments | The following table summarizes the short-term investments held at September 30, 2022 and December 31, 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross Unrealized |  | Gross Unrealized |  | ​ | ​
​ | ​ | Amortized Cost | ​ | Gains | ​ | Losses | ​ | Fair Value
September 30, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate debt securities | ​ | $ | 26,384 | ​ | $ | — | ​ | $ | (156) | ​ | $ | 26,228
Treasury Bills | ​ | ​ | 5,935 | ​ | ​ | — | ​ | ​ | (6) | ​ | ​ | 5,929
Yankee securities | ​ | ​ | 4,995 | ​ | ​ | — | ​ | ​ | (26) | ​ | ​ | 4,969
U.S. agency bonds | ​ | ​ | 3,000 | ​ | ​ | — | ​ | ​ | (27) | ​ | ​ | 2,973
Reverse repurchase agreements | ​ | ​ | 30,500 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 30,500
Total | ​ | $ | 70,814 | ​ | $ | — | ​ | $ | (215) | ​ | $ | 70,599
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | 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
​

X
- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ShortTermInvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration