Note 3 - Restructuring Actions - Restructuring Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 31, 2019	Sep. 01, 2018	Aug. 31, 2019	Sep. 01, 2018	Dec. 01, 2018
Balance			$ 4,256	$ 1,506	$ 1,506
Expenses incurred	$ 2,902	$ 2,803	5,639	5,956	8,881
Non-cash charges					(1,666)
Cash payments			(4,239)		(4,407)
Foreign currency translation			(94)		(58)
Balance	5,562		5,562		4,256
Employee Related [Member]
Balance			4,256	1,486	1,486
Expenses incurred			2,823		6,223
Non-cash charges					0
Cash payments			(2,156)		(3,395)
Foreign currency translation			(94)		(58)
Balance	4,829		4,829		4,256
Asset Related [Member]
Balance			0	0	0
Expenses incurred			961		2,353
Non-cash charges					(1,666)
Cash payments			(961)		(687)
Foreign currency translation			0		0
Balance	0		0		0
Other Restructuring [Member]
Balance			0	$ 20	20
Expenses incurred			1,855		305
Non-cash charges					0
Cash payments			(1,122)		(325)
Foreign currency translation			0		0
Balance	$ 733		$ 733		$ 0