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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, 2019
Aug. 31, 2018
Aug. 31, 2017
Net sales $ 225,356 $ 209,758 $ 185,256
Cost of sales 66,042 61,469 62,589
Selling, general, and administrative 145,319 141,126 121,148
Income tax provision (1,615) (367) 3,737
Net loss $ (1,023) $ (5,887) $ (7,172)
Net loss per share:      
Basic and diluted $ (0.07) $ (0.43) $ (0.52)
ASU 2014-09 [Member] | Without ASC 606 [Member]      
Net sales $ 225,222    
Cost of sales 66,042    
Selling, general, and administrative 145,329    
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