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COMMITMENTS AND CONTINGENCIES (Tables) | 12 Months Ended
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Dec. 31, 2021
COMMITMENTS AND CONTINGENCIES |
Schedule of minimum commitments and related payments due | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Payments due by period
​ | ​ | 2022 | ​ | 2023 | ​ | 2024 | ​ | 2025 | ​ | Thereafter | ​ | Total
Mining and surface rights | ​ | $ | 492 | ​ | $ | 488 | ​ | $ | 470 | ​ | $ | 443 | ​ | $ | — | $ | 1,893
Exploration | ​ | ​ | 8,116 | ​ | ​ | 15,080 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | 23,196
Reclamation costs(1) | ​ | ​ | 6,358 | ​ | ​ | 5,873 | ​ | ​ | 525 | ​ | ​ | 1,186 | ​ | ​ | 29,215 | ​ | 43,157
Long-term debt | ​ | ​ | 4,875 | ​ | ​ | 14,712 | ​ | ​ | 32,710 | ​ | ​ | 10,027 | ​ | ​ | — | ​ | 62,324
Lease obligations | ​ | ​ | 2,949 | ​ | ​ | 1,058 | ​ | ​ | 441 | ​ | ​ | — | ​ | ​ | — | ​ | 4,448
Total | ​ | $ | 22,791 | ​ | $ | 37,210 | ​ | $ | 34,146 | ​ | $ | 11,656 | ​ | $ | 29,215 | $ | 135,018
(1) | Amounts presented represent the undiscounted uninflated future payments.

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- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 303 -Paragraph (a) -Subparagraph (5) + Details
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- References No definition available. + Details
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