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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2024
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Schedule of advance royalties | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |
​ | ​ | 2024 |  | 2023 | ​
​ | ​ | (in thousands) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Advance royalties, affiliates (see Note 21– Related-Party Transactions) | ​ | $ | 67,189 | ​ | $ | 64,599 | ​
Advance royalties, third-parties | ​ |  | 14,497 | ​ |  | 14,306 | ​
Total advance royalties | ​ | $ | 81,686 | ​ | $ | 78,905 | ​

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