UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Income Statement [Abstract] | ||||
| Revenues | $ 72,310 | $ 68,235 | $ 135,085 | $ 133,806 |
| Cost of sales | 57,108 | 61,415 | 105,592 | 117,332 |
| Gross profit | 15,202 | 6,820 | 29,493 | 16,474 |
| Earnings of unconsolidated operations | 14,164 | 13,138 | 30,735 | 29,124 |
| Operating expenses | ||||
| Selling, general and administrative expenses | 19,248 | 19,773 | 38,949 | 37,641 |
| Amortization of intangible assets | 196 | 245 | 347 | 407 |
| Loss (gain) on sale of assets | 205 | (9) | 199 | (81) |
| Asset impairment charges | 11,984 | 0 | 11,984 | 0 |
| Operating expenses | 31,633 | 20,009 | 51,479 | 37,967 |
| Operating (loss) profit | (2,267) | (51) | 8,749 | 7,631 |
| Other expense (income) | ||||
| Interest expense | 1,620 | 1,944 | 3,278 | 3,718 |
| Interest income | (633) | (770) | (1,228) | (1,635) |
| Closed mine obligations | 445 | 503 | 934 | 976 |
| (Gain) loss on equity securities | (858) | (349) | (1,313) | 521 |
| Gain on settlement of excess funding liability | 0 | (3,590) | 0 | (3,590) |
| Other, net | 332 | 217 | 424 | 520 |
| Other (income) expense | 906 | (2,045) | 2,095 | 510 |
| (Loss) income before income tax benefit | (3,173) | 1,994 | 6,654 | 7,121 |
| Income tax benefit | (2,210) | (1,266) | (1,219) | (1,039) |
| Net (loss) income | $ (963) | $ 3,260 | $ 7,873 | $ 8,160 |
| (Loss) earnings per share: | ||||
| Basic (loss) earnings per share (in dollars per share) | $ (0.13) | $ 0.44 | $ 1.05 | $ 1.10 |
| Diluted (loss) earnings per share (in dollars per share) | $ (0.13) | $ 0.44 | $ 1.04 | $ 1.10 |
| Basic weighted average shares outstanding (in shares) | 7,542 | 7,445 | 7,508 | 7,398 |
| Diluted weighted average shares outstanding (in shares) | 7,542 | 7,445 | 7,548 | 7,446 |
| X | ||||||||||
- Definition This item represents the entity's proportionate share for the period of the pre-tax earnings of the unconsolidated mines to which the equity method of accounting is applied. Income tax amounts are included in the income tax provision line. No definition available.
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- Definition Gain (Loss) Settlement of Excess Funding Liability No definition available.
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- Definition Nonoperating (Income) Expense, Closed Mine Obligations No definition available.
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- Definition Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of impairment loss for asset. Includes, but is not limited to, tangible and intangible assets and goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest expense classified as nonoperating. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- References No definition available.
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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