Amount of average additional daily cash balance to be maintained.

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Amount of average daily cash balance to be maintained.

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No definition available.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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No definition available.

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Fixed charge coverage ratio .

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No definition available.

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Maximum borrowing capacity under the credit facility, accordion feature without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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No definition available.

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Amount of borrowings base of initial aggregate revolving commitment under line of credit facility.

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No definition available.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Note 4 - Debt - Revolving Credit Facility (Details) $ in Thousands		9 Months Ended
	Feb. 15, 2023 USD ($)	Sep. 30, 2024 USD ($)	May 03, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt
Current portion long term debt		$ 383		$ 56,534
Additional amount to be maintained in a separate dedicated account		1,000
Senior Notes, net
Debt
Estimated fair value		35,900		35,500
Equipment loans
Debt
Current portion long term debt		$ 400		2,600
Maben Coal LLC
Debt
Current portion long term debt				11,400
Revolving loans under the new facility
Debt
Fixed charge coverage ratio		1.10
Average daily cash balance		$ 5,000
Additional amount to be maintained in a separate dedicated account		1,500
Revolving Credit Facility
Debt
Initial aggregate revolving commitment	$ 125,000		$ 200,000
Initial aggregate revolving commitment		100,900
Accordion feature	$ 50,000		$ 75,000
Outstanding borrowings		43,000
Line of Credit Facility, Remaining Borrowing Capacity		$ 57,900
Current portion long term debt				$ 42,500
Revolving Credit Facility \| Secured overnight financing rate
Debt
Interest rate, basis spread	2.50%
Revolving Credit Facility \| Base Rate
Debt
Interest rate, basis spread	2.00%
Revolving Credit Facility \| Base Rate \| Minimum
Debt
Effective interest rate	0.50%
Revolving Credit Facility \| Base Rate \| Maximum
Debt
Effective interest rate	3.00%