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DEBT (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
DEBT |
Schedule of debt activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Nine months ended September 30, 2021 |  | Year ended December 31, 2020
Balance, beginning of period | ​ | $ | 48,160 | ​ | $ | 49,516
Interest expense | ​ |  | 4,166 | ​ |  | 5,394
Interest payments | ​ |  | (3,646) | ​ |  | (4,875)
Balance, end of period | ​ | $ | 48,680 | ​ | $ | 48,160
Less current portion | ​ | ​ | 4,000 | ​ | ​ | —
Long-term portion | ​ | $ | 44,680 | ​ | $ | 48,160

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- References No definition available. + Details
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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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