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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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May 26, 2019 | May 27, 2018 | May 28, 2017
Segment Reporting Information [Line Items] |  |  |
Product sales | $ 557,559 | $ 524,227 | $ 469,776
Curation Foods |  |  |
Segment Reporting Information [Line Items] |  |  |
Product sales | 481,686 | 458,800 | 410,384
Lifecore |  |  |
Segment Reporting Information [Line Items] |  |  |
Product sales | 75,873 | 65,427 | 59,392
Salads | Curation Foods |  |  |
Segment Reporting Information [Line Items] |  |  |
Product sales | 190,239 | 188,104 | 152,467
Core vegetables | Curation Foods |  |  |
Segment Reporting Information [Line Items] |  |  |
Product sales | 258,812 | 266,850 | 255,554
Emerging brands | Curation Foods |  |  |
Segment Reporting Information [Line Items] |  |  |
Product sales | 32,635 | 3,846 | 2,363
Aseptic | Lifecore |  |  |
Segment Reporting Information [Line Items] |  |  |
Product sales | 34,384 | 30,021 | 24,090
Fermentation | Lifecore |  |  |
Segment Reporting Information [Line Items] |  |  |
Product sales | 21,434 | 21,068 | 24,187
Development services | Lifecore |  |  |
Segment Reporting Information [Line Items] |  |  |
Product sales | $ 20,055 | $ 14,338 | $ 11,115

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