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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Summary of significant accounting policies |
Schedule of estimated useful lives of the assets | ​
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Asset |  | Useful lives
Buildings and improvements |  | 10 to 40 years
Machinery and equipment |  | 3 to 20 years
Mine development costs |  | Units-of-production
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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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