| Document And Entity Information | Aug. 15, 2022 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 15, 2022 |
| Entity Registrant Name | Greenidge Generation Holdings Inc. |
| Entity Central Index Key | 0001844971 |
| Entity Emerging Growth Company | true |
| Entity File Number | 001-40808 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 86-1746728 |
| Entity Address, Address Line One | 135 Rennell Drive, 3rd Floor |
| Entity Address, City or Town | Fairfield |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06890 |
| City Area Code | (203) |
| Local Phone Number | 718-5960 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Ex Transition Period | false |
| Common Stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A Common Stock, $0.0001 par value |
| Trading Symbol | GREE |
| Security Exchange Name | NASDAQ |
| Senior Note [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 8.50% Senior Notes due 2026 |
| Trading Symbol | GREEL |
| Security Exchange Name | NASDAQ |
