Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Aug. 31, 2019
Nov. 05, 2019
Feb. 28, 2019
Document and Entity Information [Abstract]      
Entity Registrant Name Lexaria Bioscience Corp.    
Entity Central Index Key 0001348362    
Current Fiscal Year End Date --08-31    
Entity Filer Category Accelerated Filer    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding   78,787,134  
Entity Public Float     $ 83,889,033
Document Type 10-K    
Document Period End Date Aug. 31, 2019    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false