Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

Document And Entity Information - USD ($)
12 Months Ended
May 31, 2017
Aug. 17, 2017
Nov. 30, 2016
Document and Entity Information [Abstract]      
Entity Registrant Name CLS HOLDINGS USA, INC.    
Document Type 10-K    
Current Fiscal Year End Date --05-31    
Entity Common Stock, Shares Outstanding   32,876,944  
Entity Public Float     $ 3,009,002
Amendment Flag false    
Entity Central Index Key 0001522222    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Smaller Reporting Company    
Entity Well-known Seasoned Issuer No    
Document Period End Date May 31, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY