MERGER WITH SUPPORT.COM - Estimated Value of The Consideration Paid (Details) $ / shares in Units, $ in Thousands	Sep. 14, 2021 USD ($) $ / shares shares	Dec. 31, 2022 $ / shares	Dec. 31, 2021 $ / shares	Sep. 13, 2021 $ / shares
Business Acquisition [Line Items]
Greenidge common stock value per share (in dollars per share)		$ 0.0001	$ 0.0001
Class A Common Stock
Business Acquisition [Line Items]
Exchange ratio	0.115
Greenidge common stock value per share (in dollars per share)	$ 0.0001			$ 0.0001
Consideration paid | $	$ 93,900
Greenidge Generation Holdings Inc
Business Acquisition [Line Items]
Support common stock exchanged (in shares) | shares	25,745,487
Exchange ratio	0.115
Greenidge common stock value per share (in dollars per share)	$ 31.71
Consideration paid | $	$ 93,885
Greenidge Generation Holdings Inc | Class A Common Stock
Business Acquisition [Line Items]
Support common stock exchanged (in shares) | shares	2,960,731