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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Organization and Restricted Cash (Details) $ in Thousands | Feb. 23, 2020 USD ($) brand technology_platform | May 26, 2019 USD ($) | Feb. 24, 2019 USD ($) | May 27, 2018 USD ($)
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Accounting Policies [Abstract] |  |  |  |
Number of natural food brands | 4 |  |  |
Number of emerging natural food brands | 3 |  |  |
New brands | 2 |  |  |
Number of proprietary platforms | technology_platform | 2 |  |  |
Restricted cash | $ | $ 193 | $ 385 | $ 385 | $ 325

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