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	Dec. 01, 2018	Dec. 02, 2017
UNITED STATES
Accumulated benefit obligation	$ 23,289	$ 25,349
Fair value of plan assets	4,514	4,669
Projected benefit obligation	23,338	25,449
Fair value of plan assets	4,514	4,669
Foreign Plan [Member]
Accumulated benefit obligation	115,725	120,459
Fair value of plan assets	75,397	82,631
Projected benefit obligation	123,484	137,618
Fair value of plan assets	$ 75,397	$ 90,434