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COVER PAGE - USD ($)
 12 Months Ended
Dec. 31, 2023
Apr. 05, 2024
Jun. 30, 2023
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-40808    
Entity Registrant Name Greenidge Generation Holdings Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 86-1746728    
Entity Address, Address Line One 135 Rennell Drive    
Entity Address, Address Line Two 3rd Floor    
Entity Address, City or Town Fairfield    
Entity Address, State or Province CT    
Entity Address, Postal Zip Code 06890    
City Area Code 315    
Local Phone Number 536-2359    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 12,143,320
Documents Incorporated by Reference
Portions of the Registrant’s definitive proxy statement for its 2024 Annual Meeting of Stockholders are incorporated by reference in Part III of this Annual Report on Form 10-K where indicated. The Registrant's definitive proxy statement will be filed with the Securities and Exchange Commission within 120 days after December 31, 2023.
    
Entity Central Index Key 0001844971    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false    
Class A Common Stock, $0.0001 par value      
Document Information [Line Items]      
Title of 12(b) Security Class A Common Stock, $0.0001 par value    
Trading Symbol GREE    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   7,052,784  
8.50% Senior Notes due 2026      
Document Information [Line Items]      
Title of 12(b) Security 8.50% Senior Notes due 2026    
Trading Symbol GREEL    
Security Exchange Name NASDAQ    
Common Class B      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   2,733,394