Note 4 - Property and Equipment (Details Textual) - USD ($)	12 Months Ended
	May 28, 2017	May 29, 2016	May 31, 2015
Depreciation, Depletion and Amortization, Nonproduction	$ 9,600,000	$ 8,200,000	$ 6,200,000
Amortization of Leased Asset	135,000	49,000	0
Capitalized Computer Software, Amortization	414,000	269,000	158,000
Capitalized Computer Software, Net	2,200,000	865,000
Interest Costs Capitalized	$ 514,000	$ 487,000	$ 45,000