COMMITMENTS AND CONTINGENCIES (Details)	1 Months Ended		3 Months Ended
	Jan. 31, 2024 MW	Sep. 30, 2020 USD ($) dth	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Aug. 31, 2024 USD ($)	Jun. 30, 2024
Product Liability Contingency [Line Items]
Environmental trust liability			$ 30,432,000		$ 30,432,000
Environmental liability related to landfill, period			30 years
Annual inflation rate on environmental liability related to landfill			2.30%
Deposit in trust for environmental liability			$ 1,300,000
Purchase commitment, energy volume required per day (in dekatherm) | dth		15,000
Purchase commitment per month		$ 200,000
Purchase commitment, termination notice period		12 months
Purchase commitment period		10 years
Mining lease term	5 years
Power of mining facility | MW	7.5
Variable lease cost			1,000,000	$ 0
Lease term							5 years
Right-of-use assets			0			$ 200,000
Lease liabilities			0			$ 200,000
Coal ash impoundment
Product Liability Contingency [Line Items]
Environmental liability			$ 17,300,000		17,300,000
Environmental liability, remediation period			4 years
Environmental trust liability			$ 13,400,000		$ 13,400,000