SEGMENT REPORTING - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Segment revenue	$ 59,533,000	$ 70,388,000
Depreciation	13,471,000	13,602,000
Selling, general and administrative	17,294,000	26,167,000
Impairment of equity securities	869,000	0
Loss (gain) on sale of assets	641,000	(9,903,000)
Impairment of long-lived assets	169,000	4,000,000
Remeasurement of environmental liability	453,000	2,409,000
Interest expense, net	7,082,000	12,659,000
Change in fair value of warrant asset	477,000	0
Gain on digital assets	(2,154,000)	0
Gain on sale of digital assets	0	(512,000)
Other income, net	(23,000)	0
Benefit from income taxes	(69,000)	0
Net loss from continuing operations	(19,785,000)	(29,039,000)
Loss from discontinued operations, net of tax	0	(471,000)
Net loss	(19,785,000)	(29,510,000)
Reportable Segment
Segment Reporting Information [Line Items]
Segment revenue	59,533,000	70,388,000
Natural Gas Expense	16,168,000	14,469,000
Electricity for Mining Expense	3,044,000	10,756,000
Emissions Expense	8,676,000	6,480,000
Hosting Fee Expense	3,428,000	7,374,000
Other Cost of Revenue	9,792,000	11,926,000
Segment gross profit	18,425,000	19,383,000
Depreciation	13,471,000	13,602,000
Selling, general and administrative	17,294,000	26,167,000
Impairment of equity securities	869,000	0
Loss (gain) on sale of assets	641,000	(9,903,000)
Impairment of long-lived assets	169,000	4,000,000
Remeasurement of environmental liability	453,000	2,409,000
Interest expense, net	7,082,000	12,659,000
Change in fair value of warrant asset	477,000	0
Gain on digital assets	(2,154,000)	0
Gain on sale of digital assets	0	(512,000)
Other income, net	(23,000)	0
Benefit from income taxes	(69,000)	0
Net loss from continuing operations	(19,785,000)	(29,039,000)
Loss from discontinued operations, net of tax	0	(471,000)
Net loss	$ (19,785,000)	$ (29,510,000)