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Cover Page - shares
 9 Months Ended
Feb. 23, 2020
Mar. 27, 2020
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 0-27446  
Entity Registrant Name LANDEC CORPORATION  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 94-3025618  
Entity Address, Address Line One 5201 Great America Parkway, Suite 232  
Entity Address, City or Town Santa Clara  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 95054  
City Area Code 650  
Local Phone Number 306-1650  
Title of 12(b) Security Common Stock  
Trading Symbol LNDC  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
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)   29,182,178
Document Period End Date Feb. 23, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Shell Company false