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Note 8 - Revenue (Details) T in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 T $ / T
REVENUES |
Term of domestic sales contracts | 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 |
REVENUES |
Percentage OF Committed Tons | 78.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |
REVENUES |
Percentage OF Committed Tons | 21.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |
REVENUES |
Percentage OF Committed Tons | 1.00%
Contracts with Indexed Based Pricing Mechanisms |
REVENUES |
Outstanding performance obligation, mass | 3.1
Fixed Priced Contracts |
REVENUES |
Outstanding performance obligation, mass | 1.1
Average per ton | $ / T | 168

X
- Definition Refers to the average fixed sales price per ton. + References No definition available. + Details
Name: | metc_ContractsWithFixedSalesPricesAverage
Namespace Prefix: | metc_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of committed tons. + References No definition available. + Details
Name: | metc_PercentageOfCommittedTons
Namespace Prefix: | metc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to the term of sales contract. + References No definition available. + Details
Name: | metc_RevenueContractTerm
Namespace Prefix: | metc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Mass of product allocated to performance obligation. + References No definition available. + Details
Name: | metc_RevenueRemainingPerformanceObligationMass
Namespace Prefix: | metc_
Data Type: | dtr-types:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
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Balance Type: |
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X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2026-01-01
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=metc_ContractsWithIndexedBasedPricingMechanismsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=metc_FixedPricedContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |