Document And Entity Information (USD $)
12 Months Ended
May 27, 2012
Jul. 20, 2012
Nov. 27, 2011
Document and Entity Information [Abstract]      
Entity Registrant Name LANDEC CORP \CA\    
Document Type 10-K    
Current Fiscal Year End Date --05-28    
Entity Common Stock, Shares Outstanding   25,678,434  
Entity Public Float     $ 126,204,000
Amendment Flag false    
Entity Central Index Key 0001005286    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date May 27, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY