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RESTRICTED CASH AND INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2022
RESTRICTED CASH AND INVESTMENTS |
Summary of restricted cash and investments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​
​ | ​ | At December 31 | ​ | At December 31
(in thousands) | ​ | 2022 | ​ | 2021
​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents | ​ | $ | 3,133 | ​ | $ | 2,866
Investments | ​ |  | 7,972 | ​ |  | 9,135
​ | ​ | $ | 11,105 | ​ | $ | 12,001
​ | ​ | ​ | ​ | ​ | ​ | ​
Restricted cash and investments-by item: | ​ |  |  | ​ |  |
Elliot Lake reclamation trust fund | ​ | $ | 3,133 | ​ | $ | 2,866
Letters of credit facility pledged assets | ​ |  | 7,972 | ​ |  | 9,000
Letters of credit additional collateral | ​ |  | — | ​ |  | 135
​ | ​ | $ | 11,105 | ​ | $ | 12,001
​

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