Note 9 - Post Employment Benefit Obligations - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 25, 2018	Aug. 26, 2017	Aug. 25, 2018	Aug. 26, 2017
Service cost	$ 49	$ 49	$ 147	$ 136
Interest cost	105	114	315	336
Amortization of prior service costs	31	24	93	49
Amortization of transition obligation	11	11	33	32
Amortization of loss	65	83	195	249
Net periodic pension cost	$ 261	$ 281	$ 783	$ 802