Document And Entity Information (USD $)
12 Months Ended
May 26, 2013
Jul. 19, 2013
Nov. 25, 2012
Document and Entity Information [Abstract]      
Entity Registrant Name LANDEC CORP \CA\    
Document Type 10-K    
Current Fiscal Year End Date --05-26    
Entity Common Stock, Shares Outstanding   26,464,518  
Entity Public Float     $ 233,854,000
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 26, 2013    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus FY