LEASES - Narrative (Details)					1 Months Ended						12 Months Ended
	Aug. 12, 2025 USD ($) a shares	May 21, 2025 contract	Oct. 09, 2024 USD ($) component renewal_option shares	Mar. 01, 2023 shares	Sep. 30, 2025	Aug. 31, 2025 a contract $ / shares MW shares	May 31, 2025 shares	Apr. 30, 2025 USD ($) renewal_option	Sep. 30, 2023 shares	Oct. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2025 USD ($) contract renewal_option $ / shares shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($)	Oct. 31, 2025 shares	Dec. 31, 2022 $ / shares shares	Jul. 31, 2022	May 31, 2021
Property, Plant and Equipment [Line Items]
Operating lease, term of lease																	8 years
Weighted average discount rate								6.20%			6.50%					12.60%
Common stock offering, net of issuance costs (in shares) | shares				40,764,706						7,481,747
Common stock offering, net of issuance costs										$ 9,400,000	$ 110,293,000	$ 189,213,000	$ 132,542,000
Lease payments											2,700,000	11,500,000	900,000
Number of lease contracts | contract		4
Prepaid rent											90,000,000.0
Principal payments on finance lease											$ 9,159,000	941,000	0
Discount rate (as percent)											6.90%
Lessee, operating lease, number of renewal options | renewal_option								2
Renewal term of lease								5 years
Letters of credit issued								$ 1,400,000
Remaining lease term											11 years 9 months 18 days
Operating lease expense											$ 5,400,000	1,700,000	1,300,000
Variable expense, operating lease											1,400,000	200,000	200,000
Amortization related to finance lease											2,500,000	100,000	$ 0
Variable expense, finance leases											1,200,000	0
Finance lease interest expense											$ 20,000	5,000
Remaining finance lease term											33 years 10 months 24 days
Number of lessor contracts | contract											2
Number of lessor contracts, not yet commenced | contract											2
Lease not yet commenced, term						10 years					10 years
Lease not yet commenced, number of renewal options | renewal_option											2
Lease not yet commenced, renewal option term											5 years
Total purchase price per agreement											$ 90,000,000.0
Base rent commencing percentage											50.00%
Current portion of deferred rent liability											$ 58,184,000	0
Deferred rent liability, net of current portion											$ 23,285,000	0
Warrants issued to lenders (in shares) | shares															8,455,410
Exercise price of warrants (in dollars per share) | $ / shares										$ 1.93	$ 0.21				$ 0.01
Accrued lessor costs											$ 27,625,000	$ 0
Related Party
Property, Plant and Equipment [Line Items]
Common stock offering, net of issuance costs (in shares) | shares									2,460,513		798,319	1,083,189
Common stock offering, net of issuance costs												$ 2,500,000
Selling, General and Administrative Expenses
Property, Plant and Equipment [Line Items]
Operating lease expense											$ 900,000
Selling, General and Administrative Expenses | Related Party
Property, Plant and Equipment [Line Items]
Operating lease expense											800,000
Operating Expense | Related Party
Property, Plant and Equipment [Line Items]
Operating lease expense											3,700,000
Google Warrants
Property, Plant and Equipment [Line Items]
Warrants issued to lenders (in shares) | shares						73,580,000
Exercise price of warrants (in dollars per share) | $ / shares						$ 0.01
Exercisable period						180 days
Fair value of the warrants attributable to the pledge agreement											515,500,000
Google Warrants, August 13, 2030
Property, Plant and Equipment [Line Items]
Warrants issued to lenders (in shares) | shares						41,011,803
Google Warrants, August 17, 2030
Property, Plant and Equipment [Line Items]
Warrants issued to lenders (in shares) | shares						32,568,197
Google Warrants, October 2025
Property, Plant and Equipment [Line Items]
Warrants issued to lenders (in shares) | shares														3,200,000,000.0
Ground Lease Lessor
Property, Plant and Equipment [Line Items]
Beneficially own (in shares) | shares							15,000,000
Letter of Credit
Property, Plant and Equipment [Line Items]
Collateral balance											$ 1,400,000
NEW YORK
Property, Plant and Equipment [Line Items]
Weighted average discount rate		6.90%
Remaining lease term		11 years 3 months 18 days
MARYLAND
Property, Plant and Equipment [Line Items]
Weighted average discount rate		6.50%
Remaining lease term											6 years 1 month 6 days
Ground Lease
Property, Plant and Equipment [Line Items]
Initial term			35 years
Lessee, number of renewal options | renewal_option			9
Renewal term			5 years
Lessee, operating lease, notice period for renewal option			6 months
Common stock offering, net of issuance costs (in shares) | shares			20,000,000.0
Common stock offering, net of issuance costs			$ 68,800,000
Lease payments			$ 12,000,000.0
Number of lease components | component			2
Discount rate (as percent)			6.90%
Number of lease contracts | contract						3
Area of real estate property (in acres) | a						162.7
Power and infrastructure equipment capacity (in MW) | MW						750
Cayuga Lease
Property, Plant and Equipment [Line Items]
Common stock offering, net of issuance costs (in shares) | shares	18,600,000
Area of real estate property (in acres) | a	183
Finance lease initial term	80 years
Prepaid rent	$ 95,000,000.0
Prepaid rent, VWAP period (in days)	15 days
Principal payments on finance lease											$ 3,000,000.0
Purchase premises	$ 100
Discount rate (as percent)	7.50%
Office Lease, Less Than Twelve Month Term
Property, Plant and Equipment [Line Items]
Number of lease contracts | contract		1
Office Lease, Over Than Thirteen Month Term
Property, Plant and Equipment [Line Items]
Number of lease contracts | contract		1
Equipment Lease
Property, Plant and Equipment [Line Items]
Finance lease, not yet commenced, term					1 year
Finance lease, not yet commenced, renewal term, increments					6 months
Finance lease, not yet commenced, renewal term					4 years
Finance leases prepaid rent											6,200,000
HPC Lease
Property, Plant and Equipment [Line Items]
Direct costs											57,400,000
Accrued lessor costs											$ 27,600,000