The amount of gain that could be realized upon the resolution of a contingency.

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The amount of expenses relating to loss contingency receivable, during the period.

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The number of raw coal storage silos.

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The number of raw coal storage silos that experienced partial structure failure.

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The percent of plant capacity restored after partial structural failure.

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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Amount awarded from other party in judgment or settlement of litigation.

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The minimum amount the entity agreed to spend under the long-term purchase commitment.

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No definition available.

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Amount of loss contingency liability.

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Amount of damages awarded to the plaintiff in the legal matter.

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Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable.

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Amount of additions to receivables pertaining to a loss contingency.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

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The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

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Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

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Note 7 - Commitments and Contingencies (Details)						1 Months Ended	3 Months Ended		12 Months Ended
Note 7 - Commitments and Contingencies (Details)	Jul. 20, 2023 USD ($)	Mar. 04, 2022 USD ($)	Jul. 16, 2021 USD ($)	Jul. 15, 2021 USD ($)	Nov. 05, 2018 item	Feb. 29, 2024 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2024 USD ($)
COMMITMENTS AND CONTINGENCIES
Royalty expense							$ 5,700,000	$ 6,800,000
Accrued amount							0			$ 0
Payments to acquire property, plant, and equipment						$ 3,000,000
Number of raw coal storage silos, failure \| item					1
Number of raw coal storage silos \| item					3
Percentage of structural failure					80.00%
Compensatory damages	$ 7,700,000	$ 1,800,000	$ 25,000,000	$ 7,700,000
Award to cover inconvenience and aggravation	$ 25,000,000
Gain recorded from contingency									$ 7,800,000
Insurance proceeds related to property, plant, and equipment									$ 2,000,000
Additional loss recovery asset							300,000
Total loss recovery asset							4,200,000
Corresponding reduction							300,000
Surety bond
COMMITMENTS AND CONTINGENCIES
Asset retirement obligation							33,200,000
Take-or-pay Purchase Commitments
COMMITMENTS AND CONTINGENCIES
Total commitment							23,300,000
Commitment							16,100,000
Environmental Restoration Costs
COMMITMENTS AND CONTINGENCIES
Regulatory Liability							0
Environmental Issue
COMMITMENTS AND CONTINGENCIES
Environmental liabilities							$ 0