Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information (USD $)
12 Months Ended
Nov. 30, 2011
Mar. 09, 2012
Feb. 28, 2012
Document and Entity Information      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Nov. 30, 2011    
Trading Symbol sdev    
Entity Registrant Name Security Devices International Inc.    
Entity Central Index Key 0001354866    
Current Fiscal Year End Date --11-30    
Entity Filer Category Smaller Reporting Company    
Entity Common Stock, Shares Outstanding   26,828,050  
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well Known Seasoned Issuer No    
Entity Public Float     $ 6,902,000
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY