ORGANIZATION AND DESCRIPTION OF BUSINESS	12 Months Ended
Dec. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Description of Business	1. ORGANIZATION AND DESCRIPTION OF BUSINESS Greenidge Generation Holdings Inc. (“Greenidge”) and its subsidiaries (collectively, the “Company”) owns and operates a vertically integrated cryptocurrency datacenter and power generation company. The Company owns and operates facilities at two locations: the Town of Torrey, New York and Spartanburg, South Carolina. The Company’s cryptocurrency datacenter operations generate revenue in the form of bitcoin by earning bitcoin as rewards and transaction fees for supporting the global bitcoin network with application-specific integrated circuit computers (“ASICs” or “miners”) owned or leased by the Company. The earned bitcoin are then exchanged for U.S. dollars. Additionally, the Company generates revenues in U.S. dollars to a lesser extent from third parties for hosting and maintaining their ASICs; however, such contracts expired in 2021. The Company also owns and operates a 106MW power facility that is connected to the New York Independent System Operator (“NYISO”) power grid. The Company sells electricity to the NYISO at all times when its power plant is running and increases or decreases the amount of electricity sold based on prevailing prices in the wholesale electricity market and demand for electricity. Merger with Support.com, Inc. On September 14, 2021, GGH Merger Sub, Inc. (“Merger Sub”), a wholly owned subsidiary of Greenidge, merged with and into Support.com, Inc. (“Support.com”), with Support.com continuing as the surviving corporation (the “Merger”) and a wholly owned subsidiary of Greenidge, pursuant to the Agreement and Plan of Merger, dated March 19, 2021 (the “Merger Agreement”), among Greenidge, Support.com and Merger Sub. The Merger combined the respective businesses of Greenidge and Support.com through an all-stock transaction and has been accounted for using the acquisition method of accounting in accordance with the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification ("ASC") 805, Business Combinations, with Greenidge being deemed the acquiring company for accounting purposes (see Note 3). Prior to the Merger, Greenidge's class A common stock was registered pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and, upon completion of the Merger on September 15, 2021, began trading on Nasdaq Global Select Market under the ticker symbol “GREE”. Concurrently, Support.com deregistered its shares pursuant to the Exchange Act. Support.com provides solutions and technical programs to customers delivered by home-based employees. Support.com’s homesourcing model, which enables outsourced work to be delivered by people working from home, has been specifically designed for remote work, with attention to security, recruiting, training, delivery, and employee engagement. Since the consummation of the Merger, the Support.com business operates as a wholly-owned subsidiary and a segment of Greenidge.

ORGANIZATION AND DESCRIPTION OF BUSINESS

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Organization and Description of Business

1. ORGANIZATION AND DESCRIPTION OF BUSINESS

Greenidge Generation Holdings Inc. (“Greenidge”) and its subsidiaries (collectively, the “Company”) owns and operates a vertically integrated cryptocurrency datacenter and power generation company. The Company owns and operates facilities at two locations: the Town of Torrey, New York and Spartanburg, South Carolina. The Company’s cryptocurrency datacenter operations generate revenue in the form of bitcoin by earning bitcoin as rewards and transaction fees for supporting the global bitcoin network with application-specific integrated circuit computers (“ASICs” or “miners”) owned or leased by the Company. The earned bitcoin are then exchanged for U.S. dollars. Additionally, the Company generates revenues in U.S. dollars to a lesser extent from third parties for hosting and maintaining their ASICs; however, such contracts expired in 2021. The Company also owns and operates a 106MW power facility that is connected to the New York Independent System Operator (“NYISO”) power grid. The Company sells electricity to the NYISO at all times when its power plant is running and increases or decreases the amount of electricity sold based on prevailing prices in the wholesale electricity market and demand for electricity.

Merger with Support.com, Inc.

On September 14, 2021, GGH Merger Sub, Inc. (“Merger Sub”), a wholly owned subsidiary of Greenidge, merged with and into Support.com, Inc. (“Support.com”), with Support.com continuing as the surviving corporation (the “Merger”) and a wholly owned subsidiary of Greenidge, pursuant to the Agreement and Plan of Merger, dated March 19, 2021 (the “Merger Agreement”), among Greenidge, Support.com and Merger Sub.

The Merger combined the respective businesses of Greenidge and Support.com through an all-stock transaction and has been accounted for using the acquisition method of accounting in accordance with the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification ("ASC") 805, Business Combinations, with Greenidge being deemed the acquiring company for accounting purposes (see Note 3). Prior to the Merger, Greenidge's class A common stock was registered pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and, upon completion of the Merger on September 15, 2021, began trading on Nasdaq Global Select Market under the ticker symbol “GREE”. Concurrently, Support.com deregistered its shares pursuant to the Exchange Act.

Support.com provides solutions and technical programs to customers delivered by home-based employees. Support.com’s homesourcing model, which enables outsourced work to be delivered by people working from home, has been specifically designed for remote work, with attention to security, recruiting, training, delivery, and employee engagement. Since the consummation of the Merger, the Support.com business operates as a wholly-owned subsidiary and a segment of Greenidge.