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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Aug. 25, 2019	May 27, 2018	May 31, 2020	May 26, 2019	May 27, 2018	Nov. 25, 2019	Jul. 15, 2014
Related Party Transaction [Line Items]
Cash flow hedge loss to be reclassified within twelve months			$ 2,000
Restricted cash		$ 325	193	$ 385	$ 325
Advertising expense			1,800	1,300	1,400
Notes or advances outstanding			0	2,000
Goodwill impairment loss			$ 7,860	0
Business interruption insurance recovery	$ 3,000
Amount participants are allowed to contribute of their salaries			50.00%
Company contribution to employee contribution plan			$ 2,200	1,800	1,800
Lease liability, operating			27,240
Operating lease, right-of-use asset			$ 25,321	0
ASU 2016-02
Related Party Transaction [Line Items]
Lease liability, operating				31,100
Operating lease, right-of-use asset				30,000
ASU 2016-02 | Cumulative Effect Adjustment
Related Party Transaction [Line Items]
Stockholders' equity				300
ASU 2019-12 | Cumulative Effect Adjustment
Related Party Transaction [Line Items]
Stockholders' equity						$ 400
Apio Cooling, LP
Related Party Transaction [Line Items]
Payments to acquire additional interest in subsidiaries		4,700
Decrease in additional paid-in-capital		2,600
Amount in Apio Cooling's non-controlling interest account		$ 1,500			1,500
Windset
Related Party Transaction [Line Items]
Ownership percentage			26.90%
Software Development | Maximum
Related Party Transaction [Line Items]
Useful life of property and equipment			7 years
Software Development | Minimum
Related Party Transaction [Line Items]
Useful life of property and equipment			3 years
First Three Percent Match
Related Party Transaction [Line Items]
Company match of contribution plan, percent			100.00%
Percent of employees' gross pay			3.00%
Next Two Percent Match
Related Party Transaction [Line Items]
Company match of contribution plan, percent			50.00%
Percent of employees' gross pay			2.00%
Windset
Related Party Transaction [Line Items]
Accounts receivable balance from related parties			$ 500	500
Windset | Cost of sales
Related Party Transaction [Line Items]
Expenses from related parties			600
Revenue from related parties				$ 600	$ 600
O Olive & Vinegar
Related Party Transaction [Line Items]
Goodwill impairment loss			5,200
Impairment of property and equipment			1,300
O Olive & Vinegar | Customer relationships
Related Party Transaction [Line Items]
Impairment of finite-lived intangible assets			500
Yucatan Foods, LP
Related Party Transaction [Line Items]
Goodwill impairment loss			$ 2,700
Revenue | Customer Concentration Risk | Top 5 Customers
Related Party Transaction [Line Items]
Concentration risk			48.00%	43.00%
Revenue | Customer Concentration Risk | Wal-mart | Curation Foods
Related Party Transaction [Line Items]
Concentration risk			18.00%	16.00%
Revenue | Customer Concentration Risk | Costco | Curation Foods
Related Party Transaction [Line Items]
Concentration risk			15.00%	14.00%
Accounts Receivable | Customer Concentration Risk | Wal-mart
Related Party Transaction [Line Items]
Concentration risk			13.00%	13.00%
Accounts Receivable | Customer Concentration Risk | Costco
Related Party Transaction [Line Items]
Concentration risk			7.00%	8.00%
Accounts Receivable | Customer Concentration Risk | Largest Customer | Lifecore
Related Party Transaction [Line Items]
Concentration risk			12.00%	13.00%
Apio Cooling, LP
Related Party Transaction [Line Items]
Non-controlling voting interest acquired		40.00%			40.00%
Windset
Related Party Transaction [Line Items]
Investment ownership percentage			26.90%				26.90%
Trademarks | Eat Smart
Related Party Transaction [Line Items]
Restructuring costs and impairment of assets charges				$ 2,000
Trademarks | O Olive & Vinegar
Related Party Transaction [Line Items]
Restructuring costs and impairment of assets charges			$ 1,100
Trademarks | Yucatan Foods, LP
Related Party Transaction [Line Items]
Restructuring costs and impairment of assets charges			$ 3,500

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