Note 8 - Commitments and Contingencies (Details Textual)		9 Months Ended	12 Months Ended
	Sep. 03, 2015 ft²	May 29, 2016 USD ($)	May 29, 2016 USD ($) $ / shares	May 31, 2015 USD ($)	May 25, 2014 USD ($)
Apio [Member]
Capital Leases, Balance Sheet, Assets by Major Class, Net		$ 133,000	$ 133,000
Capital Lease, Number of Renewal Options	2
Capital Lease, Renewal Period	5 years
Operating Leases, Rent Expense			4,500,000	$ 5,000,000	$ 4,400,000
Area of Real Estate Property | ft²	65,000
Capital Lease, Initial Term	7 years
Capital Lease, Period After Which Buyout Option is Available	7 years
Capital Leases, Balance Sheet, Assets by Major Class, Net		3,800,000	3,800,000
Capital Lease, Monthly Lease Payment		$ 34,000
Capital Lease, Percentage Per Year By Which the Monthly Payment Increases		2.40%
Purchase Commitment, Remaining Minimum Amount Committed		$ 23,700,000	23,700,000
Payment on Purchase Commitments		$ 30.50	30.50	$ 16,800,000	$ 7,100,000
Loss Contingency, Loss in Period			$ 775,000
Loss Contingency Per Diluted Share | $ / shares			$ 0.02