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Revenue (Narrative) (Details)	6 Months Ended	12 Months Ended
	Feb. 29, 2020 USD ($) segment	Aug. 31, 2019 USD ($)
Accrued sales returns	$ 5,592,000	$ 5,432,000
Accrued sales incentives	18,843,000	14,770,000
Prepaid sales incentives	4,031,000	2,788,000
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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