Note 4 - Property and Equipment - Components of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	May 28, 2017	May 29, 2016
Property and Equipment	$ 193,631	$ 174,854
Less Accumulated Depreciation and Amortization	(60,411)	(53,974)
Net Property and Equipment	133,220	120,880	[1]
Land and Building [Member]
Property and Equipment	86,983	67,192
Leasehold Improvements [Member]
Property and Equipment	1,190	1,620
Computer Capitalized Software Machinery Equipment and Auto [Member]
Property and Equipment	97,375	87,464
Furniture and Fixtures [Member]
Property and Equipment	1,272	901
Construction in Progress [Member]
Property and Equipment	$ 6,811	$ 17,677
Minimum [Member] | Land and Building [Member]
Property, Plant and Equipment, Useful Life	15 years
Minimum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment, Useful Life	3 years
Minimum [Member] | Computer Capitalized Software Machinery Equipment and Auto [Member]
Property, Plant and Equipment, Useful Life	3 years
Minimum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member] | Land and Building [Member]
Property, Plant and Equipment, Useful Life	40 years
Maximum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment, Useful Life	20 years
Maximum [Member] | Computer Capitalized Software Machinery Equipment and Auto [Member]
Property, Plant and Equipment, Useful Life	20 years
Maximum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life	7 years

[1] Derived from audited financial statements. See Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies for discussion of accounting guidance adopted during the period.