Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Current assets
Cash and cash equivalents	$ 355,205	$ 440,347
Accounts receivable	66,335	54,354
Inventories	105,546	87,155
Prepaid expenses and other	15,616	15,750
Total current assets	542,702	597,606
Property, plant, and equipment, net	517,090	511,943
Financing lease right-of-use assets, net	14,998	15,763
Advanced coal royalties	6,260	5,815
Other	10,538	9,442
Total Assets	1,091,588	1,140,569
Current liabilities
Accounts payable	57,004	41,600
Accrued liabilities	43,487	54,724
Current portion of asset retirement obligations	997	1,797
Current portion of long-term debt	6	56
Current portion of financing lease obligations	7,625	7,281
Insurance financing liability	2,121	4,042
Total current liabilities	111,240	109,500
Long-term asset retirement obligations	34,270	33,122
Long-term financing lease obligations	9,137	10,184
Long-term debt, net	452,063	451,361
Deferred tax liability, net	38,469	44,309
Other long-term liabilities	9,405	8,527
Total liabilities	654,584	657,003
Commitments and contingencies
Stockholders' Equity
Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued or outstanding
Additional paid-in capital	470,099	483,326
Treasury stock, at cost: 1,032,202 shares at March 31, 2026 and zero at December 31, 2025	(15,031)
Retained earnings (accumulated deficit)	(18,632)	(311)
Total stockholders' equity	437,004	483,566
Total Liabilities and Stockholders' Equity	1,091,588	1,140,569
Class A Common Stock
Stockholders' Equity
Common stock	458	445
Class B Common Stock
Stockholders' Equity
Common stock	$ 110	$ 106

The amount outstanding on insurance financing liability.

No definition available.

Name:	metc_InsuranceFinancingLiability
Namespace Prefix:	metc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).