Note 4 - Supplemental Financial Statement Information - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 03, 2016	Nov. 28, 2015	Nov. 29, 2014
Balance at beginning of year	$ 11,893	$ 10,246	$ 8,538
Charged to expenses	2,455	4,703	3,998
Write-offs	(1,758)	(2,339)	(1,866)
Foreign currency translation effect	(280)	(717)	(424)
Balance at end of year	$ 12,310	$ 11,893	$ 10,246