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v3.22.4

Note 3 - Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment. |
Schedule of property, plant, and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
(In thousands) | ​ | 2022 |  | 2021
Plant and equipment | ​ | $ | 232,885 | ​ | $ | 167,019
Mining property and mineral rights | ​ | ​ | 120,760 | ​ | ​ | 26,064
Construction in process | ​ |  | 34,698 | ​ |  | 9,972
Capitalized mine development costs | ​ |  | 153,436 | ​ |  | 104,291
Less: accumulated depreciation and amortization | ​ |  | (111,937) | ​ |  | (80,269)
Total property, plant and equipment, net | ​ | $ | 429,842 | ​ | $ | 227,077
​
Schedule of depreciation and amortization | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
(In thousands) |  | 2022 |  | 2021 |  | 2020
Depreciation of plant and equipment | ​ | $ | 24,132 | ​ | $ | 17,945 | ​ | $ | 17,094
Amortization of right of use assets (finance leases) | ​ | ​ | 4,846 | ​ | ​ | 1,109 | ​ | ​ | —
Amortization and depletion of | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
capitalized mine development costs and mineral rights | ​ |  | 12,216 | ​ |  | 7,151 | ​ | ​ | 3,818
Total depreciation, depletion, and amortization | ​ | $ | 41,194 | ​ | $ | 26,205 | ​ | $ | 20,912

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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