Note 10 - Pension and Postretirement Benefits - Pension Plans With Accumulated Benefit and Projected Benefit Obligations in Excess of Plan Assets (Details) - Pension Plan [Member] - USD ($) $ in Thousands	Nov. 28, 2020	Nov. 30, 2019
UNITED STATES
Accumulated benefit obligation	$ 26,241	$ 24,344
Fair value of plan assets	5,441	5,004
Projected benefit obligation	26,241	24,344
Fair value of plan assets	5,441	5,004
Foreign Plan [Member]
Accumulated benefit obligation	134,472	125,073
Fair value of plan assets	84,239	79,437
Projected benefit obligation	145,461	134,910
Fair value of plan assets	$ 84,239	$ 79,437