EARNINGS PER SHARE - Basic Earnings and Diluted per Share of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Numerator
Net (loss) income from continuing operations	$ (269,741)	$ 21,600
Less: Net income attributable to the member units before the reorganization	0	(648)
Net (loss) income from continuing operations attributable to Greenidge	(269,741)	20,952
Loss from discontinued operations, net of tax	(1,327)	(66,080)
Net loss, basic	(271,068)	(45,128)
Net loss, diluted	$ (271,068)	$ (45,128)
Denominator
Basic weighted average shares outstanding (in shares)	42,373,000	31,995,000
Dilutive effect of equity awards (in shares)	0	592,000
Dilutive effect of convertible preferred stock (in shares)	0	4,048,000
Diluted weighted average shares outstanding (in shares)	42,373,000	36,635,000
(Loss) earnings per basic share:
(Loss) earnings per basic share from continuing operations (in dollars per share)	$ (6.37)	$ 0.65
Loss per basic share from discontinued operations (in dollars per share)	(0.03)	(2.06)
(Loss) earnings per basic share (in dollars per share)	(6.40)	(1.41)
(Loss) earnings per diluted share:
(Loss) earnings per diluted share from continuing operations (in dollars per share)	(6.37)	0.57
Loss per diluted share from discontinued operations (in dollars per share)	(0.03)	(1.80)
(Loss) earnings per diluted share (in dollars per share)	$ (6.40)	$ (1.23)