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v3.22.2.2

ACCRUED EXPENSES (Tables) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021
Payables and Accruals [Abstract] |  |
Components of Accrued Expenses | The following table sets forth the composition of accrued expenses as of June 30, 2022 and December 31, 2021 (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | December 31,
​ |  | June 30, 2022 |  | 2021
Research and development | ​ | $ | 1,847 | ​ | $ | 1,841
Payroll-related expenses | ​ |  | 3,099 | ​ | ​ | 2,967
Restructuring charge related | ​ |  | 394 | ​ | ​ | 1,497
Professional fees | ​ |  | 507 | ​ | ​ | 597
Legal expenses, including preliminary litigation settlement | ​ |  | 22,477 | ​ | ​ | 1,344
Other | ​ | ​ | 1,527 | ​ | ​ | 9
Total Accrued Expenses | ​ | $ | 29,851 | ​ | $ | 8,255
| The following table sets forth the composition of accrued expenses as of December 31, 2021 and 2020 (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31,
​ | ​ | 2021 |  | 2020
Research and development | ​ | $ | 1,841 | ​ | $ | 1,372
Payroll-related expenses | ​ |  | 2,967 | ​ |  | 1,892
Restructuring charge related | ​ |  | 1,497 | ​ |  | —
Professional fees | ​ |  | 1,941 | ​ |  | 684
Other | ​ |  | 9 | ​ |  | 25
Total Accrued Expenses | ​ | $ | 8,255 | ​ | $ | 3,973

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