Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Mar. 11, 2020
Jun. 28, 2019
Document and Entity Information      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Registrant Name 22nd Century Group, Inc.    
Entity Central Index Key 0001347858    
Current Fiscal Year End Date --12-31    
Entity Current Reporting Status Yes    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Trading Symbol XXII    
Entity Public Float     $ 249
Entity Common Stock, Shares Outstanding   138,856,809  
Entity Emerging Growth Company false    
Entity Small Business true    
Entity Shell Company false