Note 8 - Employee Post-employment Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 01, 2016	Mar. 03, 2015	Mar. 01, 2016	Mar. 03, 2015
Pension Benefits [Member]
Service cost	$ 33	$ 75	$ 305	$ 225
Interest cost	495	443	1,535	1,330
Expected return on plan assets	(103)	(124)	(308)	(373)
Defined Benefit Plan, Amortization of Gains (Losses)	730	430	1,831	1,290
Net periodic benefit cost	1,156	824	3,364	2,472
Postretirement Medical and Life Benefits [Member]
Service cost	1	1	3	3
Interest cost	12	12	36	35
Defined Benefit Plan, Amortization of Gains (Losses)	32	33	97	100
Net periodic benefit cost	45	$ 46	136	$ 138
Curtailment expense	$ 1		$ 1