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Revenue (Narrative) (Details)	3 Months Ended	12 Months Ended
	Dec. 01, 2018 USD ($) segment	Sep. 01, 2018 USD ($)
Accrued sales returns	$ 4,838,000	$ 4,832,000
Performance obligation	0	0
Accrued sales incentives	15,166,000	14,000,000
Prepaid sales incentives	2,899,000	2,457,000
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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