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Intangible Assets And Goodwill (Narrative) (Details)
 12 Months Ended
Aug. 31, 2025
USD ($)
Aug. 31, 2024
USD ($)
item
Aug. 31, 2023
USD ($)
Finite-Lived Intangible Assets [Line Items]      
Acquisition of content rights $ 1,074,000 $ 750,000  
Aggregate amortization expense from definite-lived intangible assets 4,400,000 4,200,000 $ 4,300,000
Accumulated impairment charges 0    
Goodwill, impairment $ 0    
Contractual Rights [Member]      
Finite-Lived Intangible Assets [Line Items]      
Acquisition of content rights   $ 1,500,000  
Number of payment installments | item   2  
Amount of installment payments of acquired intangible assets   $ 800,000  
Amortized useful life   10 years