Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

Document And Entity Information - USD ($)
12 Months Ended
Nov. 30, 2021
Feb. 01, 2022
May 28, 2021
Document Information [Line Items]      
Entity Central Index Key 0001354866    
Entity Registrant Name Byrna Technologies Inc.    
Amendment Flag false    
Current Fiscal Year End Date --11-30    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Nov. 30, 2021    
Document Transition Report false    
Entity File Number 333-132456    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 71-1050654    
Entity Address, Address Line One 100 Burtt Road, Suite 115    
Entity Address, City or Town Andover    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 01810    
City Area Code 978    
Local Phone Number 868-5011    
Title of 12(b) Security Common stock, $0.001, par value per share    
Trading Symbol BYRN    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers Yes    
Entity Current Reporting Status No    
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 Public Float     $ 496,644,504
Entity Common Stock, Shares Outstanding   23,815,418  
Auditor Name EISNERAMPER LLP    
Auditor Location New York, New York    
Auditor Firm ID 274    
ICFR Auditor Attestation Flag true