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Note 10 - Intangible Assets, Net | 12 Months Ended
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Dec. 31, 2024
Notes to Financial Statements |
Goodwill and Intangible Assets Disclosure [Text Block] | 10. Intangible Assets, Net The Partnership's intangible assets consist of above-market coal royalty and related transportation contracts with subsidiaries of Foresight Energy Resources LLC ("Foresight") pursuant to which the Partnership receives royalty payments for coal sales and throughput fees for the transportation and processing of coal. The Partnership's intangible assets included on its Consolidated Balance Sheets are as follows:
|  | December 31, |
(In thousands) |  | 2024 |  |  | 2023 |
Intangible assets at cost |  | $ | 51,353 |  |  | $ | 51,353 |
Less: accumulated amortization |  |  | (38,429 | ) |  |  | (37,671 | )
Total intangible assets, net |  | $ | 12,924 |  |  | $ | 13,682 |
Amortization expense included in depreciation, depletion and amortization on the Partnership's Consolidated Statements of Comprehensive Income was $0.8 million, $1.0 million and $1.4 million for the year ended December 31, 2024, 2023 and 2022, respectively. The estimates of amortization expense for the years ended December 31, as indicated below, are based on current lessee mining plans and are subject to revision as those plans change in future periods.
(In thousands) |  | Estimated Amortization Expense |
2025 |  | $ | 792 |
2026 |  |  | 691 |
2027 |  |  | 1,008 |
2028 |  |  | 720 |
2029 |  |  | 480 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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