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CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Tables) | 9 Months Ended
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Sep. 30, 2021
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH |
Schedule of reconciliation of cash and cash equivalents, and restricted cash | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021 | ​ | December 31, 2020
Cash and cash equivalents | ​ | $ | 63,144 | ​ | $ | 20,843
Restricted cash - current | ​ | ​ | 2,550 | ​ | ​ | -
Restricted cash - non-current | ​ | ​ | 3,625 | ​ | ​ | 3,595
Total cash, cash equivalents, and restricted cash | ​ | $ | 69,319 | ​ | $ | 24,438

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