| Cover - USD ($) | 12 Months Ended | ||
| Dec. 31, 2022 | Jun. 30, 2023 | Mar. 01, 2023 | |
| Cover [Abstract] | |||
| Document Type | 10-K/A | ||
| Amendment Flag | false | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Document Period End Date | Dec. 31, 2022 | ||
| Document Fiscal Period Focus | FY | ||
| Document Fiscal Year Focus | 2022 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Entity File Number | 001-36338 | ||
| Entity Registrant Name | 22nd Century Group, Inc. | ||
| Entity Central Index Key | 0001347858 | ||
| Entity Tax Identification Number | 98-0468420 | ||
| Entity Incorporation, State or Country Code | NV | ||
| Entity Address, Address Line One | 500 Seneca Street, Suite 507 | ||
| Entity Address, City or Town | Buffalo | ||
| Entity Address, State or Province | NY | ||
| Entity Address, Postal Zip Code | 14204 | ||
| City Area Code | 716 | ||
| Local Phone Number | 270-1523 | ||
| Title of 12(b) Security | Common Stock, $0.00001 par value | ||
| Trading Symbol | XXII | ||
| Security Exchange Name | NASDAQ | ||
| 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 | false | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 420 | ||
| Entity Common Stock, Shares Outstanding | 215,704,036 | ||
| ICFR Auditor Attestation Flag | true | ||
| Auditor Name | Freed Maxick, CPAs, P.C. | ||
| Auditor Location | Buffalo, New York | ||
| Auditor Firm ID | 317 |
