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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+ Details

EQUITY - Common Stock (Details)	3 Months Ended	6 Months Ended
EQUITY - Common Stock (Details)	Jun. 30, 2022 $ / T	Jun. 30, 2026 Vote D	Jun. 21, 2023
EQUITY
Percent of royalty fee income	3.00%
Price per ton of coal processed at preparation plants	5
Price per ton of loaded coal at rail load-out facilities	2.5
Threshold trading days volume weighted average price \| D		20
Class B Common Stock
EQUITY
Distribution ratio			0.2
Number of votes per common share \| Vote		1
Percentage dividend from financial performance of carbon	20