EARNINGS PER SHARE - Schedule of Basic Earnings and Diluted Per Share of Common Stock (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator
Net (loss) income	$ (107,882)	$ (429)	$ 3,518	$ 1,279	$ (108,310)	$ 4,797
Less: Net income attributable to the member units units before the reorganization			(0)			(648)
Net (loss) income attributable to Greenidge	$ (107,882)		$ 3,518		$ (108,310)	$ 4,149
Denominator
Basic weighted average shares outstanding	41,555		28,320		41,308	28,283
Dilutive effect of equity awards			625			482
Dilutive effect of convertible preferred stock			6,480			6,480
Diluted weighted average shares outstanding	41,555		35,425		41,308	35,245
(Loss) earnings per share
Basic	$ (2.61)		$ 0.12		$ (2.62)	$ 0.15
Diluted	$ (2.61)		$ 0.10		$ (2.62)	$ 0.12