Document And Entity Information - shares
6 Months Ended
Nov. 24, 2019
Dec. 27, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name LANDEC CORP \CA\  
Entity Central Index Key 0001005286  
Current Fiscal Year End Date --05-31  
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Common Stock, Shares Outstanding (in shares)   29,162,983
Document Type 10-Q  
Document Period End Date Nov. 24, 2019  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Current Reporting Status Yes  
Entity Shell Company false