Note 8 - Employee Post-employment Benefits (Details) - Components of Net Periodic Benefit Cost - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Jun. 04, 2013	Jun. 02, 2015	Jun. 03, 2014	Jun. 04, 2013
Pension Benefits [Member]
Note 8 - Employee Post-employment Benefits (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost			$ 301	$ 356	$ 460
Interest cost			1,773	1,737	2,100
Expected return on plan assets			(498)	(444)	(409)
Amortization of prior service cost	[1]		1	1	106
Recognized actuarial loss			1,718	1,711	2,259
Curtailment expense		$ 2,500			2,481
Net periodic benefit cost			3,295	3,361	6,997
Postretirement Medical and Life Benefits [Member]
Note 8 - Employee Post-employment Benefits (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost			4	13	11
Interest cost			$ 46	67	60
Amortization of prior service cost	[1]			(46)	(56)
Recognized actuarial loss			$ 134	244	214
Net periodic benefit cost			$ 184	$ 278	$ 229

[1] Prior service costs are amortized on a straight-line basis over the average remaining service period of employees expected to receive benefits.