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Inventories | 3 Months Ended
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Mar. 31, 2023
Inventory Disclosure [Abstract] |
Inventories | Inventories Inventories are summarized as follows:
| MARCH 31 2023 |  | DECEMBER 31 2022
Coal | $ | 26,229 |  |  | $ | 27,927 |
Mining supplies | 45,017 |  |  | 43,561 |
Total inventories | $ | 71,246 |  |  | $ | 71,488 |
During the first quarter of 2023, the Company recorded a $2.4 million inventory impairment charge in the line “Cost of sales” in the accompanying Unaudited Consolidated Statements of Operations as mining costs exceeded net realizable value at MLMC.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI https://asc.fasb.org/topic&trid=2126998 + Details
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