Note 9 - Post Employment Benefit Obligations - Recognized Deferred Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 26, 2018	May 27, 2017	May 26, 2018	May 27, 2017
Unfunded Deferred Compensation Plan [Member]
Deferred compensation expense	$ 80	$ 82	$ 159	$ 136