Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Aug. 10, 2024
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-36338
Entity Registrant Name	22nd Century Group, Inc.
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	98-0468420
Entity Address, Address Line One	321 Farmington Road
Entity Address, City or Town	Mocksville
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27028
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 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 Common Stock, Shares Outstanding		9,272,518
Entity Central Index Key	0001347858
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Amendment Flag	false