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CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Tables) | 3 Months Ended
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Mar. 31, 2022
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH |
Schedule of reconciliation of cash and cash equivalents, and restricted cash | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2022 | ​ | December 31, 2021
Cash and cash equivalents | ​ | $ | 63,783 | ​ | $ | 54,287
Restricted cash - current | ​ | ​ | 2,850 | ​ | ​ | 2,550
Restricted cash - non-current | ​ | ​ | 3,797 | ​ | ​ | 3,797
Total cash, cash equivalents, and restricted cash | ​ | $ | 70,430 | ​ | $ | 60,634

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