Note 11 - 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. 30, 2019	Dec. 01, 2018
UNITED STATES
Accumulated benefit obligation	$ 24,344	$ 23,289
Fair value of plan assets	5,004	4,514
Projected benefit obligation	24,344	23,338
Fair value of plan assets	5,004	4,514
Foreign Plan [Member]
Accumulated benefit obligation	125,073	115,725
Fair value of plan assets	79,437	75,397
Projected benefit obligation	134,910	123,484
Fair value of plan assets	$ 79,437	$ 75,397