SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION - Noncash Investing and Financing Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Shares issued to Support.com shareholders upon Merger	$ 0	$ 93,885
Stock issued to purchase miners	0	991
Contribution of Preferred Units, Senior Priority Units, and notes payable to related party for Greenidge class B common stock	0	72,048
Issuance of shares for investor fee associated with successful completion of Merger	0	17,826
Issuance of warrants to advisor in connection with completion of Merger	0	8,779
Property and equipment purchases in accounts payable	$ 6,676	$ 2,769