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Nature Of Operations And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2019
Sep. 01, 2019
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]        
Cash and cash equivalents $ 47,417 $ 27,137    
Capitalized curriculum development spending 2,500      
Capitalized development costs 6,200 8,100    
Foreign currency transaction gains (losses) (100) (100) $ (200)  
Advertising costs 4,000 3,300 $ 4,600  
Restructuring charges   $ 1,636    
Remaining accrued restructuring costs $ 400      
Percent likelihood of being realized upon ultimate settlement 50.00%      
Operating lease liabilities $ 1,775      
Operating lease right of use assets 1,775      
Held Outside The US By Foreign Subsidiaries [Member]        
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]        
Cash and cash equivalents 14,500      
Covey Trade Name [Member]        
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]        
Goodwill, impairment loss $ 0      
Minimum [Member]        
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]        
Capitalized development costs, amortization period 3 years      
Maximum [Member]        
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]        
Capitalized development costs, amortization period 5 years      
Accounting Standards Update 2016-02 [Member]        
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]        
Operating lease liabilities       $ 1,500
Operating lease right of use assets       $ 1,500