The annual reduction in penalty for prepayment.

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Annual percentage penalty to be paid in the event of prepayment.

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Conversion percentage of outstanding debt principal.

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Conversion value of outstanding debt principal.

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Represents the amount of monthly installments under a debt agreement.

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Represents the amount of monthly installments under a debt agreement until maturity.

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Refers to offering costs related notes.

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Number of installments.

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Number of periodic payments to be made.

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Amount of unamortized asset balance with insurance premiums.

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Amount of upfront payments of insurance premiums to insurance carriers.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. 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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Face (par) amount of debt instrument at time of issuance.

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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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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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the required periodic payments including both interest and principal payments.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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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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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of income (expense) related to nonoperating activities, classified as other.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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Balance Type:
Period Type:

Note 7 - Debt (Details) $ in Thousands									1 Months Ended		3 Months Ended		12 Months Ended
Note 7 - Debt (Details) $ in Thousands	Sep. 23, 2022 USD ($)	Apr. 29, 2022 USD ($) installment	Jan. 11, 2022 USD ($) installment	Oct. 29, 2021 USD ($)	Aug. 16, 2021 USD ($)	Jul. 13, 2021 USD ($)	Apr. 20, 2020 USD ($)	Apr. 16, 2020 USD ($)	Jan. 31, 2023 USD ($)	Apr. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) installment	Dec. 31, 2022 USD ($) installment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Oct. 31, 2022 USD ($)	Nov. 24, 2021 USD ($)	Jul. 23, 2021 USD ($)
Debt
Unamoritzed discounts and issuance costs											$ 1,700		$ 1,700
Frequency of periodic payment												monthly
Debt issuance costs incurred														$ 2,356
Current portion of long-term debt											35,639		35,639	7,674
Long-term Debt, Total											128,896		128,896
Other income													2,637	7,429	$ 11,926
Outstanding principal amount											$ 127,226		127,226	43,376
Insurance financing
Debt
Term of debt											1 year
Long-term Debt, Total											$ 4,600
Premium payments											5,600
Insurance premiums											5,100		5,100
Maben Coal, LLC
Debt
Aggregate principal amount	$ 21,000
Maben Coal, LLC
Debt
Voting interest acquired	100.00%
Revolving Credit Facility
Debt
Line of Credit Facility, Maximum Borrowing Capacity														38,500
Amount of remaining availability														13,500
Current portion of long-term debt											20,000		20,000
Outstanding on Revolving Credit Facility														25,000
Senior Notes.
Debt
Aggregate principal amount						$ 34,500
Long-term Debt, Total											$ 32,800		$ 32,800
Effective interest rate											10.45%		10.45%
Interest rate						9.00%
Redemption price percentage						100.00%
Amount of note offering costs						$ 2,400
Unamortized discounts and issuance costs						$ 1,700
Equipment Loan
Debt
Current portion of long-term debt											$ 6,000		$ 6,000
PPP Loan
Debt
Long-term Debt, Total													0	$ 0
Proceeds from loan							$ 8,400
Other income							$ 8,400
Ramaco Coal Loan
Debt
Aggregate principal amount		$ 55,000
Number of installments \| installment		7
Frequency of periodic payment		quarterly
Current portion of long-term debt											40,000		40,000
Long-term Debt, Total											40,000		40,000
Interest rate		9.00%
Outstanding principal amount											40,000		40,000
Ramaco Coal Loan \| Maximum
Debt
Percentage available for conversion		50.00%
Amount available for conversion		$ 30,000
Ramaco Coal Loan \| 2022
Debt
Amount paid per installment		$ 5,000
Ramaco Coal Loan \| 2023.
Debt
Amount paid per installment										$ 10,000
Maben Coal Loan
Debt
Current portion of long-term debt											9,600		$ 9,600
Maben Coal Loan \| Forecast
Debt
Frequency of periodic payment									monthly
Maben Coal Loan \| Secured overnight financing rate
Debt
Debt Instrument, Basis Spread on Variable Rate	3.00%
KeyBank National Association \| Revolving Credit Facility
Debt
Aggregate principal amount				$ 30,000
Line of Credit Facility, Maximum Borrowing Capacity				$ 40,000
KeyBank National Association \| Revolving Credit Facility \| Secured overnight financing rate
Debt
Debt Instrument, Basis Spread on Variable Rate				2.00%
KeyBank National Association \| Revolving Credit Facility \| Base Rate
Debt
Debt Instrument, Basis Spread on Variable Rate				1.50%
KeyBank National Association \| Revolving Credit Facility \| Fed Funds Effective Rate Overnight Index Swap Rate
Debt
Debt Instrument, Basis Spread on Variable Rate				0.50%
KeyBank National Association \| Letter of Credit
Debt
Aggregate principal amount				$ 3,000
KeyBank National Association \| Term Loan
Debt
Aggregate principal amount				$ 10,000
Frequency of periodic payment													monthly
Amount of monthly installments											278		$ 278
KeyBank National Association \| Term Loan \| London Interbank Offered Rate (LIBOR)
Debt
Debt Instrument, Basis Spread on Variable Rate													5.15%
KeyBank National Association \| Equipment Loan
Debt
Aggregate principal amount								$ 4,700
Amount paid per installment													$ 147
Number of installments \| installment													36
Frequency of periodic payment													monthly
Long-term Debt, Total											600		$ 600
Annual percent of premium prepayment								3.00%
Annual premium decline in premium prepayment								1.00%
Interest rate								7.45%
J. H. Fletcher & Co \| Equipment Loan
Debt
Aggregate principal amount												$ 4,400					$ 3,900	$ 900
Amount paid per installment												$ 195
Number of installments \| installment												24
Frequency of periodic payment													monthly
Long-term Debt, Total											6,100		$ 6,100
Interest rate																		0.00%
Amount of monthly installments																		$ 200
Number Of Monthly Installments													24 months
Komatsu Financial Limited Partnership \| Equipment Loan
Debt
Aggregate principal amount					$ 1,000
Amount paid per installment					$ 28
Frequency of periodic payment													monthly
Long-term Debt, Total											500		$ 500
Interest rate					4.60%
Number Of Monthly Installments													36 months
Komatsu Financial Limited Partnership \| Equipment Loan \| Initial Period For Periodic Payments Under Debt Instrument [Member]
Debt
Amount of monthly installments					$ 36
Brandeis Machinery & Supply Company \| Equipment Loan
Debt
Aggregate principal amount			$ 1,400													$ 600
Number of installments \| installment			48
Frequency of periodic payment			monthly
Long-term Debt, Total											1,200		$ 1,200
Interest rate			4.80%
Investec Bank PLC \| Maben Coal Loan
Debt
Aggregate principal amount	$ 21,000										$ 21,000		$ 21,000
Investec Bank PLC \| Maben Coal Loan \| Forecast
Debt
Amount of monthly installments until maturity									$ 800,000