Note 8 - Post Employment Benefit Obligations - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 29, 2020	Mar. 02, 2019
Service cost	$ 43	$ 47
Interest cost	67	110
Amortization of prior service costs	31	31
Amortization of transition obligation	0	0
Amortization of loss	1	46
Net periodic pension cost	$ 142	$ 234