Note 5 - Property, Equipment, and Assets Held for Sale (Details Textual) - USD ($)	3 Months Ended
	Aug. 30, 2016	Sep. 01, 2015	May 31, 2016
Disposal Group, Including Discontinued Operation, Assets, Current	$ 11,849,000		$ 4,642,000
Property, Plant and Equipment, Disposals	0	$ 2,100,000
Gain (Loss) on Disposition of Property Plant Equipment	100,000	600,000
Proceeds from Sale of Property Plant and Equipment, Net	$ 100,000	$ 2,700,000