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Document And Entity Information (USD $)
 12 Months Ended
May 25, 2014
Jul. 18, 2014
Nov. 24, 2013
Document and Entity Information [Abstract]      
Entity Registrant Name LANDEC CORP \CA\    
Document Type 10-K    
Current Fiscal Year End Date --05-25    
Entity Common Stock, Shares Outstanding   26,839,725  
Entity Public Float     $ 294,141,000
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 25, 2014    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY