| Document and Entity Information Document | Jun. 29, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jun. 29, 2020 |
| Entity Registrant Name | LANDEC CORPORATION |
| Entity Central Index Key | 0001005286 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 0-27446 |
| Entity Tax Identification Number | 94-3025618 |
| Entity Address, Address Line One | 5201 Great America Parkway |
| Entity Address, Address Line Two | 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | LNDC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
