SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)					3 Months Ended		6 Months Ended	12 Months Ended
	Nov. 27, 2024 USD ($)	Sep. 24, 2024 shares	Apr. 26, 2024	Nov. 09, 2023 USD ($)	Mar. 28, 2025 USD ($) shares	Dec. 31, 2024 USD ($) shares	Mar. 25, 2025 USD ($) shares	Dec. 31, 2024 USD ($) segment shares	Dec. 31, 2023 USD ($)	Dec. 11, 2023	Dec. 31, 2021
Debt Instrument [Line Items]
Extinguishment of debt								$ 80,300,000
Number of operating segments | segment								1
Number of reportable segments | segment								1
Accounts receivable						$ 1,493,000		$ 1,493,000	$ 358,000
Percentage of annual emission expense and credit in the following year						50.00%		50.00%
Impairment of long-lived assets								$ 169,000	4,000,000
Impairment of equity securities								$ 869,000	0
Warrant term (in years)						1 year		1 year		1 year
Change in fair value of warrant asset								$ (477,000)	$ 0
Share based compensation arrangement, expiration period (in years)								10 years
Vesting period (in years)								3 years
Expected dividend yield			0.00%					0.00%	0.00%
Accumulated deficit						$ 389,737,000		$ 389,737,000	$ 369,974,000
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Accumulated deficit									20,000.00
Discontinued Operations, Disposed of by Sale | South Carolina Datacenter
Debt Instrument [Line Items]
Cash acquired from disposal	$ 12,100,000			$ 4,500,000
Disposal group, including discontinued operation, consideration from sale, profit participation percentage	8.00%
Revision of Prior Period, Accounting Standards Update, Adjustment | Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Accumulated deficit						(22,000)		(22,000)	0
Cost of Sales
Debt Instrument [Line Items]
Emissions Expense								$ 8,700,000	$ 6,500,000
Power and capacity
Debt Instrument [Line Items]
Revenue, payment period (within)								7 days
Cryptocurrency mining
Debt Instrument [Line Items]
Accounts receivable						0		$ 0
Senior Unsecured Notes | Senior Notes
Debt Instrument [Line Items]
Debt exchanged						$ 3,660,000		$ 3,660,000
Interest rate (as percent)						8.50%		8.50%			8.50%
Exchange Agreement
Debt Instrument [Line Items]
Number of shares issued in transaction (in shares) | shares						692,433
Common Stock Purchase Agreement
Debt Instrument [Line Items]
Number of shares issued in transaction (in shares) | shares		7,300,000						1,595,855
Net proceeds received								$ 4,300,000
Subsequent Event | Senior Unsecured Notes | Senior Notes
Debt Instrument [Line Items]
Debt exchanged					$ 1,800,000
Interest rate (as percent)					8.50%
Subsequent Event | Common Stock Purchase Agreement
Debt Instrument [Line Items]
Number of shares issued in transaction (in shares) | shares							1,595,855
Net proceeds received							$ 4,300,000
Subsequent Event | Debt Exchange Agreements
Debt Instrument [Line Items]
Number of shares issued in transaction (in shares) | shares					643,456