Document And Entity Information Document Information [Table] Class of Stock [Axis] Class of Stock [Domain] Common Class A [Member] Class A Common Stock Common Class B [Member] Class B Common Stock Debt Instrument [Axis] Debt Instrument, Name [Domain] Refers to Senior Notes Due 2029. Senior Notes Due 2029 [Member] Senior Notes due 2029 8.375% Senior Notes due 2029 Represents the information pertaining to 8.25% Senior Unsecured Notes due 2030. Senior Notes, Due 2030 [Member] Senior Notes due 2030 8.250% Senior Notes due 2030 Document Information [Line Items] Document And Entity Information Document Type Document Annual Report Document Period End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line Two Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company ICFR Auditor Attestation Flag Document Financial Statement Error Correction [Flag] Entity Shell Company Entity Shell Company Entity Public Float Entity Common Stock, Shares Outstanding Documents Incorporated by Reference [Text Block] Auditor Firm ID Auditor Name Auditor Location Amendment Description Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Condensed Consolidated Balance Sheets Statement [Table] Statement Assets, Current [Abstract] Current assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Total cash & cash equivalents Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable Inventory, Net Inventories Total inventories Prepaid Expense, Current Prepaid expenses and other Assets, Current Total current assets Property, Plant and Equipment, Net Total property, plant, and equipment, net Property, plant, and equipment, net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Financing lease right-of-use assets, net Advance Royalties, Noncurrent Advanced coal royalties Other Assets, Noncurrent Other Assets Total Assets Liabilities [Abstract] Liabilities Liabilities, Current [Abstract] Current liabilities Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued liabilities Total accrued liabilities Asset Retirement Obligation, Current Current portion of asset retirement obligations Long-Term Debt, Current Maturities Current portion of long-term debt Current portion of long-term debt Finance Lease, Liability, Current Current portion of financing lease obligations The amount outstanding on insurance financing liability. Insurance Financing Liability Insurance financing liability Liabilities, Current Total current liabilities Asset Retirement Obligations, Noncurrent Long-term asset retirement obligations Carrying value as of the balance sheet date of equipment loans (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Long-Term Equipment Loan, Noncurrent Long-term equipment loans Finance Lease, Liability, Noncurrent Long-term financing lease obligations Senior Notes Long-term debt, net Deferred Income Tax Liabilities, Net Deferred tax liability, net Other Liabilities, Noncurrent Other long-term liabilities Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies EQUITY Stockholders' Equity Preferred Stock, Value, Issued Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued or outstanding Common Stock, Value, Issued Common stock Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings (accumulated deficit) Equity, Attributable to Parent Balance Balance Total stockholders' equity Liabilities and Equity Total Liabilities and Stockholders' Equity Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized (in shares) Preferred Stock, Shares Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Outstanding Preferred stock, shares outstanding (in shares) Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Common stock, shares issued (in shares) Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) Condensed Consolidated Statements of Operations Revenue from Contract with Customer, Including Assessed Tax Revenue Total revenue Cost of Goods and Services Sold [Abstract] Costs and expenses Cost of Goods and Services Sold Cost of sales (exclusive of items shown separately below) Asset retirement obligations accretion Asset retirement obligations accretion Accretion of asset retirement obligations Asset retirement obligations accretion Depreciation, Depletion and Amortization Depreciation, depletion, and amortization Depreciation, depletion, and amortization Total depreciation, depletion, and amortization Selling, General and Administrative Expense Selling, general, and administrative Selling, general, and administrative Costs and Expenses Total costs and expenses Operating Income (Loss) Operating income (loss) Other Nonoperating Income (Expense) Other income (expense), net Other segment items Interest Income (Expense), Nonoperating Interest expense, net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (loss) before tax Income Tax Expense (Benefit) Income tax benefit (expense) Income tax expense (benefit) Total Net income (loss) Net income (loss) EARNINGS (LOSS) PER SHARE Earnings (loss) per common share Earnings Per Share, Basic Basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Condensed Consolidated Statements of Stockholders' Equity Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional Paid-in Capital Retained Earnings [Member] Retained Earnings Retained Earnings Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Shares surrendered for withholding taxes payable Restricted Stock, Value, Shares Issued Net of Tax Withholdings Shares surrendered for withholding taxes Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense) Stock options exercised APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Stock-based compensation Dividends, Common Stock, Stock Stock dividend declared and distributed Dividends, Common Stock, Cash Cash dividends and dividend equivalents declared Value of non-cash dividend declared and distributed . Adjustment To Additional Paid In Capital, Non Cash Dividends Declared and Distributed Non-cash dividends declared and distributed Dividends, Common Stock, Paid-in-kind Non-cash dividends declared but not distributed Restricted Stock Award, Forfeitures, Dividends Dividend equivalent units forfeited Amount of decrease in additional paid in capital (APIC) resulting from premium paid on capped calls. Adjustments To Additional Paid in Capital, Premium Paid For Capped Calls Capped call purchase Aggregate amount paid for capped calls Stock Issued During Period, Value, New Issues Class A common stock equity issuance Condensed Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash from operating activities: Amortization of Debt Issuance Costs Amortization of debt issuance costs Share-Based Payment Arrangement, Noncash Expense Stock-based compensation Stock-based compensation Gain (Loss) on Disposition of Property Plant Equipment (Gain)/loss on disposal of assets Other Noncash Income (Expense) Other income - gain on insurance recoveries Deferred Income Tax Expense (Benefit) Deferred income taxes Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts and Notes Receivable Accounts receivable Increase (Decrease) in Prepaid Expense Prepaid expenses and other current assets Increase (Decrease) in Inventories Inventories Increase (Decrease) in Other Operating Assets and Liabilities, Net Other assets and liabilities Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued liabilities Net Cash Provided by (Used in) Operating Activities Net cash from (used in) operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from (used in) investing activities: Payments for Capital Improvements Capital expenditures The cash outflow from the purchase of mining related assets and mining rights during the period. Payments To Acquire Mining Assets And Mining Rights Land and mineral acquisition The cash inflow associated with the acquisition bond recovery. Acquisition Bond Recovery Acquisition of Maben assets (bond recovery in 2023) Proceeds from Sale of Property, Plant, and Equipment Insurance proceeds related to property, plant, and equipment Insurance proceeds related to property, plant, and equipment The cash outflow for acquisition of or plant capital expenditures to properties held for investment (operating, managed, leased) or for use. Payments for Plant Capital Expenditures Maben preparation plant capital expenditures Interest Paid, Capitalized, Investing Activities Capitalized interest Payments for (Proceeds from) Other Investing Activities Other Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from (used in) financing activities: Proceeds from Issuance Initial Public Offering Proceeds from equity offering The amount of payment of equity offering costs. Payment Of Equity Offering Costs Payment of equity offering costs Proceeds from Debt, Net of Issuance Costs Proceeds from long-term debt issuances The cash outflow related to premium paid on capped calls. Payments Of Premium On Capped Calls Purchase of capped calls Proceeds from Issuance of Debt Proceeds from borrowings Repayments of Debt Repayment of borrowings Repayments of Notes Payable Repayments of senior notes Repayments of Related Party Debt Repayment of Ramaco Coal acquisition financing - related party Proceeds from Stock Options Exercised Proceeds from stock options exercised Payments of Dividends Payment of dividends The repayments of financing insurance payable. Repayments Of Financed Insurance Payable Repayments of insurance financing Refers to repayments of financing lease equipment. Repayments of financing leased equipment Repayments of equipment finance leases Payments of Debt Issuance Costs Payment of debt issuance costs Payment, Tax Withholding, Share-Based Payment Arrangement Shares surrendered for withholding taxes payable Net Cash Provided by (Used in) Financing Activities Net cash from (used in) financing activities Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Net change in cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Cash and cash equivalents and restricted cash, end of period Cash and cash equivalents and restricted cash, beginning of period Cash Equivalents, at Carrying Value Cash and cash equivalents Restricted Cash, Current Restricted cash Restricted Cash and Cash Equivalents, Current Total cash, cash equivalents and restricted cash Supplemental Cash Flow Information [Abstract] Supplemental cash flow information: Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for interest (net of amounts capitalized) Income Taxes Paid Cash paid for income taxes Proceeds from Income Tax Refunds Cash received for income tax refund Noncash Investing and Financing Items [Abstract] Non-cash investing and financing activities: Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Leased assets under financing leases Capital Expenditures Incurred but Not yet Paid Capital expenditures included in accounts payable and accrued liabilities Liabilities Assumed Financed insurance The fair value of liabilities assumed in noncash investing or financing activities. Financed Insurance Financed insurance (2022 adjustment recorded in 2023) Dividends Payable Accrued dividends and dividend equivalents payable BUSINESS AND BASIS OF PRESENTATION Business Description and Basis of Presentation [Text Block] BUSINESS AND BASIS OF PRESENTATION SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] PROPERTY, PLANT AND EQUIPMENT ASSET RETIREMENT OBLIGATIONS. Asset Retirement Obligation Disclosure [Text Block] ASSET RETIREMENT OBLIGATIONS ACCRUED LIABILITIES AND OTHER LONG-TERM LIABILITIES Accounts Payable and Accrued Liabilities Disclosure [Text Block] ACCRUED LIABILITIES AND OTHER LONG-TERM LIABILITIES