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Nature Of Operations And Summary Of Significant Accounting Policies (Balance Sheet Impacted By Adoption Of New Accounting Standard) (Details) - USD ($)
$ in Thousands
Aug. 31, 2019
Sep. 01, 2018
Aug. 31, 2018
Assets:      
Other current assets $ 11,027   $ 10,893
Deferred income tax assets 5,045   3,222
Total assets 224,913   213,875
Liabilities and Shareholders' Equity:      
Deferred subscription revenue 56,250   47,417
Other deferred revenue 5,972   4,471
Other liabilities 7,527   5,501
Retained earnings 59,403   63,569
Total liabilities and shareholders' equity 224,913   $ 213,875
ASU 2014-09 [Member]      
Assets:      
Other current assets   $ 11,002  
Deferred income tax assets   4,227  
Liabilities and Shareholders' Equity:      
Deferred subscription revenue   48,870  
Other deferred revenue   5,026  
Other liabilities   7,750  
Retained earnings   60,426  
ASU 2014-09 [Member] | ASC 606 Adjustments [Member]      
Assets:      
Other current assets   109  
Deferred income tax assets   1,005  
Liabilities and Shareholders' Equity:      
Deferred subscription revenue   1,453  
Other deferred revenue   555  
Other liabilities   2,249  
Retained earnings   $ (3,143)  
Without ASC 606 [Member]      
Assets:      
Other current assets 10,908    
Deferred income tax assets 4,075    
Total assets 223,824    
Liabilities and Shareholders' Equity:      
Deferred subscription revenue 55,247    
Other deferred revenue 5,417    
Other liabilities 4,961    
Retained earnings 62,438    
Total liabilities and shareholders' equity 223,824    
Impact Of ASC 606 [Member] | ASU 2014-09 [Member]      
Assets:      
Other current assets 119    
Deferred income tax assets 970    
Total assets 1,089    
Liabilities and Shareholders' Equity:      
Deferred subscription revenue 1,003    
Other deferred revenue 555    
Other liabilities 2,566    
Retained earnings (3,035)    
Total liabilities and shareholders' equity $ 1,089