Note 10 - Asbestos Related Lawsuits and Claims (Details) - Asbestos Related Lawsuits And Claims [Member] $ in Thousands	9 Months Ended		36 Months Ended
	Aug. 27, 2016 USD ($)	Aug. 29, 2015 USD ($)	Nov. 28, 2015 USD ($)
Lawsuits and claims settled	9	6	25
Settlement amounts	$ 978	$ 463	$ 2,072
Insurance payments received or expected to be received	$ 645	$ 373	$ 1,648