Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
6 Months Ended
Jun. 30, 2020
Aug. 07, 2020
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Amendment Flag false  
Document Period End Date Jun. 30, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2  
Entity File Number 001-36338  
Entity Registrant Name 22nd Century Group, Inc.  
Entity Central Index Key 0001347858  
Current Fiscal Year End Date --12-31  
Entity Incorporation, State or Country Code NV  
Entity Tax Identification Number 98-0468420  
Entity Address, Address Line One 8560 Main Street  
Entity Address, Address Line Two Suite 4  
Entity Address, City or Town Williamsville  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 14221  
City Area Code 716  
Local Phone Number 270-1523  
Title of 12(b) Security Common Stock, $0.00001 par value  
Security Exchange Name NYSEAMER  
Trading Symbol XXII  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   138,854,193