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CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Tables) | 12 Months Ended
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Dec. 31, 2021
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH |
Schedule of reconciliation of cash and cash equivalents, and restricted cash | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021 | ​ | December 31, 2020
Cash and cash equivalents | ​ | $ | 54,287 | ​ | $ | 20,843
Restricted cash - current | ​ | ​ | 2,550 | ​ | ​ | -
Restricted cash - non-current | ​ | ​ | 3,797 | ​ | ​ | 3,595
Total cash, cash equivalents, and restricted cash | ​ | $ | 60,634 | ​ | $ | 24,438

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