| Cover | Jan. 24, 2025 |
| Entity Listings [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 24, 2025 |
| Entity Registrant Name | Greenidge Generation Holdings Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40808 |
| Entity Tax Identification Number | 86-1746728 |
| Entity Address, Address Line One | 590 Plant Road |
| Entity Address, Address Line Two | |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001844971 |
| Class A common stock, par value $.0001 | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | Class A common stock, par value $.0001 |
| Trading Symbol | GREE |
| Security Exchange Name | NASDAQ |
| 8.50% Senior Notes due 2026 | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 8.50% Senior Notes due 2026 |
| Trading Symbol | GREEL |
| Security Exchange Name | NASDAQ |
