Note 8 - Post Employment Benefit Obligations - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 27, 2021	Feb. 29, 2020
Service cost	$ 31	$ 43
Interest cost	48	67
Amortization of prior service costs	31	31
Amortization of loss	15	1
Net periodic pension cost	$ 125	$ 142