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Revenue (Narrative) (Details)	3 Months Ended	12 Months Ended
	Nov. 28, 2020 USD ($) segment	Aug. 29, 2020 USD ($)
Accrued sales returns	$ 5,374,000	$ 5,315,000
Accrued sales incentives	20,570,000	19,679,000
Prepaid sales incentives	3,516,000	3,762,000
Performance obligation	0	0
Contract assets	0	0
Contract liabilities	$ 0	$ 0
Number of operating segments | segment	1
Number of reportable segments | segment	1
Maximum [Member]
Payment term	1 year

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