EARNINGS PER SHARE - Schedule of Basic Earnings and Diluted Per Share of Common Stock (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Numerator
Net (loss) income	$ (44,480)	$ (3,290)
Less: Net income attributable to the member units units before the reorganization	(648)
Net loss attributable to Greenidge	$ (45,127)
Denominator
Basic weighted average shares outstanding	31,995
Dilutive effect of equity awards	0
Dilutive effect of convertible preferred stock	0
Diluted weighted average shares outstanding	31,995
Loss per share
Basic	$ (1.41)
Diluted	$ (1.41)