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LONG-TERM DEBT (Tables) | 12 Months Ended
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Dec. 31, 2021
LONG-TERM DEBT |
Schedule of debt activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year ended December 31, 2021 |  | Year ended December 31, 2020
Balance, beginning of period | ​ | $ | 48,160 | ​ | $ | 49,516
Interest expense | ​ |  | 5,581 | ​ |  | 5,394
Interest payments | ​ |  | (4,875) | ​ |  | (4,875)
Bonus Interest - Equity based financing fee | ​ | ​ | — | ​ | ​ | (1,875)
Balance, end of period | ​ | $ | 48,866 | ​ | $ | 48,160

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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