Commitments and Contingencies (Details) (USD $)	9 Months Ended		36 Months Ended
	Aug. 30, 2014	Aug. 31, 2013	Nov. 30, 2013
Product Liability Contingency [Line Items]
Lawsuits and claims settled	4	3	22
Settlement amounts	$ 190,000	$ 74,000	$ 1,448,000
Insurance Payments Received Or Expected To Be Received	$ 155,000	$ 8,000	$ 1,087,000