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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended	12 Months Ended
	May 27, 2018 USD ($) $ / shares	May 26, 2019 USD ($) brand technology_platform $ / shares customer shares	May 27, 2018 USD ($) $ / shares customer shares	May 28, 2017 USD ($) $ / shares shares	Aug. 25, 2019 USD ($)	Jan. 11, 2019 brand	Jul. 15, 2014
Related Party Transaction [Line Items]
Number of natural food brands \| brand		4				4
Number of emerging natural food brands \| brand						3
Number of new natural food brands \| brand		2				2
Number of proprietary platforms \| technology_platform		2
Restricted cash	$ 325,000	$ 385,000	$ 325,000	$ 325,000
Advertising expense		1,300,000	1,400,000	1,900,000
Notes or advances outstanding	$ 2,700,000	2,000,000	2,700,000
Goodwill impairment loss		$ 0	$ 0	$ 0
Amount of common stock available for purchase (in shares) \| shares		1,576,919	1,495,380	1,428,272
Weighted average exercise price of common stock (in dollars per share) \| $ / shares	$ 13.80	$ 13.74	$ 13.80	$ 13.58
Company contribution to employee contribution plan		$ 1,800,000	$ 1,800,000	$ 1,500,000
Subsequent Event \| Scenario, Forecast \| ASU 2016-02
Related Party Transaction [Line Items]
Transitional adjustment for accounting standards update					$ 300,000
Right-of-use asset, operating lease					30,000,000
Lease liability, operating					$ 31,100,000
Apio Cooling, LP
Related Party Transaction [Line Items]
Payments to acquire additional interest in subsidiaries	$ 4,700,000
Decrease in additional paid-in-capital	2,600,000
Amount in Apio Cooling's non-controlling interest account	1,500,000		1,500,000
Maximum
Related Party Transaction [Line Items]
Amount participants are allowed to contribute of their salaries		50.00%
Maximum \| Customer relationships
Related Party Transaction [Line Items]
Useful life of finite-lived intangible assets		13 years
Minimum
Related Party Transaction [Line Items]
Amount participants are allowed to contribute of their salaries		1.00%
Minimum \| Customer relationships
Related Party Transaction [Line Items]
Useful life of finite-lived intangible assets		11 years
Buildings and Leasehold Improvements \| Maximum
Related Party Transaction [Line Items]
Useful life of property and equipment		40 years
Buildings and Leasehold Improvements \| Minimum
Related Party Transaction [Line Items]
Useful life of property and equipment		3 years
Furniture and Fixtures, Computers, Capitalized Software, Capitalized Leases, Machinery, Equipment and Autos \| Maximum
Related Party Transaction [Line Items]
Useful life of property and equipment		20 years
Furniture and Fixtures, Computers, Capitalized Software, Capitalized Leases, Machinery, Equipment and Autos \| Minimum
Related Party Transaction [Line Items]
Useful life of property and equipment		3 years
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	$ 300,000	$ 500,000	300,000
Windset \| Cost of sales
Related Party Transaction [Line Items]
Revenue from related parties		$ 600,000	$ 600,000	$ 500,000
Sales Revenue, Goods, Net \| Customer Concentration Risk
Related Party Transaction [Line Items]
Number of major customers \| customer		5	5
Concentration risk		43.00%	49.00%
Sales Revenue, Goods, Net \| Customer Concentration Risk \| Costco and Wal-mart
Related Party Transaction [Line Items]
Number of major customers \| customer		2	2
Sales Revenue, Goods, Net \| Customer Concentration Risk \| Costco
Related Party Transaction [Line Items]
Concentration risk		14.00%	19.00%
Sales Revenue, Goods, Net \| Customer Concentration Risk \| Wal-mart
Related Party Transaction [Line Items]
Concentration risk		16.00%	18.00%
Accounts Receivable \| Customer Concentration Risk \| Costco and Wal-mart
Related Party Transaction [Line Items]
Number of major customers \| customer		2	2
Accounts Receivable \| Customer Concentration Risk \| Costco
Related Party Transaction [Line Items]
Concentration risk		8.00%	13.00%
Accounts Receivable \| Customer Concentration Risk \| Wal-mart
Related Party Transaction [Line Items]
Concentration risk		13.00%	18.00%
Accounts Receivable \| Customer Concentration Risk \| Customer One
Related Party Transaction [Line Items]
Concentration risk		13.00%
Accounts Receivable \| Customer Concentration Risk \| Customer Two
Related Party Transaction [Line Items]
Concentration risk		8.00%
Accounts Receivable \| Customer Concentration Risk \| Customer Three
Related Party Transaction [Line Items]
Concentration risk		6.00%
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%
Trade Names
Related Party Transaction [Line Items]
Intangible assets		$ 2,000,000	$ 0