Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
12 Months Ended
Nov. 30, 2020
Feb. 23, 2021
May 29, 2020
Cover [Abstract]      
Entity Registrant Name Byrna Technologies Inc.    
Document Type 10-K    
Entity Central Index Key 0001354866    
Amendment Flag false    
Document Period End Date Nov. 30, 2020    
Entity File Number 333-132456    
Current Fiscal Year End Date --11-30    
Entity Incorporation, State or Country Code DE    
Entity Voluntary Filers Yes    
Entity Well Known Seasoned Issuer No    
Entity Current Reporting Status No    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Emerging Growth Company false    
Entity Small Business true    
Entity Shell Company false    
Entity Public Float     $ 126,299,568
Entity Common Stock, Shares Outstanding   149,201,088  
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY