Cover - USD ($)	12 Months Ended
	Dec. 31, 2023	Apr. 05, 2024	Jun. 30, 2023
Document Type	10-K/A
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-K/A (this “Amendment”) amends the Annual Report on Form 10-K of Greenidge Generation Holdings Inc. (the “Company,” “we,” “us,” or “our”) for the year ended December 31, 2023 (the “Original Form 10-K”) filed with the Securities and Exchange Commission (the “SEC”) on April 10, 2024. This Amendment is being filed solely to provide additional information in the "Revenue" section of "Item 7. Management’s Discussion and Analysis of Financial Conditions and Results of Operations" in response to a comment received by a letter, dated April 26, 2024, from the staff of the SEC concerning the Company’s mining equipment and the Company’s average cost to mine each bitcoin for the year ended December 31, 2023.
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2023
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2023
Current Fiscal Year End Date	--12-31
Entity File Number	001-40808
Entity Registrant Name	Greenidge Generation Holdings Inc.
Entity Central Index Key	0001844971
Entity Tax Identification Number	86-1746728
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	590 Plant Road
Entity Address, City or Town	Dresden
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	14441
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
Elected Not To Use the Extended Transition Period	false
Entity Shell Company	false
Entity Public Float			$ 12,143,320
Documents Incorporated by Reference [Text Block]	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.
Document Financial Statement Error Correction [Flag]	false
Auditor Firm ID	206
Auditor Firm ID	MaloneBailey, LLP
Auditor Firm ID	Houston, Texas
Class A Common Stock, $0.0001 par value
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
Title of 12(b) Security	8.50% Senior Notes due 2026
Trading Symbol	GREEL
Security Exchange Name	NASDAQ
Common Class B [Member]
Entity Common Stock, Shares Outstanding		2,733,394