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Nature Of Operations And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)
 12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents $ 38,230,000 $ 60,517,000  
Capitalized curriculum development spending 9,000,000.0    
Capitalized development costs 10,900,000 5,000,000.0  
Foreign currency transaction gains (losses) (100,000) (500,000) $ (100,000)
Impairment of long-lived assets 0 0  
Advertising costs $ 4,500,000 4,800,000 $ 4,000,000.0
Percent likelihood of being realized upon ultimate settlement 50.00%    
Held Outside The US By Foreign Subsidiaries [Member]      
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents $ 12,000,000.0    
Covey Trade Name [Member]      
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]      
Goodwill, impairment loss $ 0 $ 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