Document And Entity Information - shares	3 Months Ended
	Aug. 25, 2019	Sep. 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)		29,152,474
Document Type	10-Q
Document Period End Date	Aug. 25, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Current Reporting Status	Yes
Entity Shell Company	false