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Cash and Cash Equivalents (Tables) | 12 Months Ended
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Dec. 31, 2021
Cash and Cash Equivalents |
Summary of Cash and Cash Equivalents | The following is a summary of cash and cash equivalents at December 31, 2020 and 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31,
​ |  | 2020 |  | 2021
Cash | ​ | $ | 28,080 | ​ | $ | 32,082
Cash equivalents | ​ |  | 5,326 | ​ |  | 4,477
Total cash and cash equivalents | ​ | $ | 33,406 | ​ | $ | 36,559

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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