SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) bitcoinMiner miningPoolOperator $ / shares shares	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) bitcoinMiner operatingSegment miningPoolOperator $ / shares shares	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Oct. 31, 2022 $ / shares	Dec. 31, 2021 USD ($)
Significant Accounting Policies [Line Items]
Cash exceeding FDIC limit	$ 0		$ 0
Cash and cash equivalents and restricted cash	6,595,000	$ 11,731,000	6,595,000	$ 11,731,000	$ 8,323,000		$ 46,455,000
Restricted cash	0		$ 0
Number of operating segments | operatingSegment			1
Deposits on miners			$ 16,300,000		$ 57,600,000
Asset impairment charges	0	0	$ 0	0
Percentage of changes In debt value and net presents value of future cash flows			10.00%
Quoted price of bitcoin	38,000		$ 38,000
Miner hosting revenue	1,800,000	1,400,000	5,800,000	1,800,000
Impairment of intangible assets		100,000	2,200,000	700,000
Power curtailment credits	1,700,000	$ 100,000	2,500,000	$ 100,000
Other income	$ 0		$ 39,000
Number of common stock issued upon conversion of preferred stock (in shares) | shares	1,100,000		1,100,000
Warrants outstanding (in shares) | shares	49,120,642		49,120,642
Exercise price of warrants (in dollars per share) | $ / shares	$ 0.58		$ 0.58			$ 1.93
Number suppliers for bitcoin miners | bitcoinMiner	2		2
Number of mining pool operators | miningPoolOperator	1		1
Data center hosting customer | Revenue Benchmark | Customer Concentration Risk
Significant Accounting Policies [Line Items]
Concentration risk percentage	9.50%	36.20%	12.70%	32.90%
Restricted Stock Units (RSUs)
Significant Accounting Policies [Line Items]
Number of shares outstanding (in shares) | shares	6,422,632		6,422,632
Computer Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life			5 years
Digital Currency Mining Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life			4 years
Digital Currency
Significant Accounting Policies [Line Items]
Impairment of intangible assets	$ 900,000