XML 246 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Apr. 05, 2021
Jun. 30, 2020
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity File Number 000-56075    
Entity Registrant Name 4Front Ventures Corp.    
Entity Incorporation, State or Country Code A1    
Entity Tax Identification Number 83-4168417    
Entity Address, Address Line One 5060 N. 40th Street    
Entity Address, Address Line Two Suite 120    
Entity Address, City or Town Phoenix    
Entity Address, State or Province AZ    
Entity Address, Postal Zip Code 85018    
City Area Code 602    
Local Phone Number 633-3067    
Trading Symbol FFNT    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Shell Company false    
Entity Ex Transition Period false    
Entity Common Stock, Shares Outstanding   566,186,697  
Entity Central Index Key 0001783875    
Amendment Flag false    
Entity Public Float     $ 212,679,364
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
ICFR Auditor Attestation Flag false    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE:

None.

   
Class A Subordinate Voting Shares      
Document Information [Line Items]      
Trading Symbol FFNTF    
Title of 12(g) Security Class A Subordinate Voting Shares, no par value