| Cover | Dec. 20, 2022 |
| Entity Listings [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 20, 2022 |
| 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 | 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 | 203 |
| Local Phone Number | 718-5960 |
| 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 |
