Note 4 - Supplemental Financial Statement Information - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2019	Dec. 01, 2018	Dec. 02, 2017
Balance at beginning of year	$ 14,017	$ 11,670	$ 12,310
Charged to expenses and other adjustments	2,678	6,445	744
Write-offs	(5,947)	(2,187)	(1,546)
Foreign currency translation effect	(66)	(1,911)	162
Balance at end of year	$ 10,682	$ 14,017	$ 11,670