Nature Of Operations And Summary Of Significant Accounting Policies (Schedule Of Statements Of Operations Impacted By Adoption Of New Accounting Standard) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Net sales	$ 198,456	$ 225,356	$ 209,758
Cost of sales	53,086	66,042	61,469
Selling, general, and administrative	129,979	140,530	138,280
Income tax provision	(10,231)	(1,615)	(367)
Net loss	$ (9,435)	$ (1,023)	$ (5,887)
Net loss per share:
Basic and diluted	$ (0.68)	$ (0.07)	$ (0.43)
ASU 2014-09 [Member] | Without ASC 606 [Member]
Net sales		$ 225,222
Cost of sales		66,042
Selling, general, and administrative		140,540
Income tax provision		(1,580)
Net loss		$ (1,132)
Net loss per share:
Basic and diluted		$ (0.08)
ASU 2014-09 [Member] | Impact Of ASC 606 [Member]
Net sales		$ 134
Selling, general, and administrative		(10)
Income tax provision		(35)
Net loss		$ 109