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Secured Credit Agreement (Narrative) (Details) - The 2023 Credit Agreement [Member] - USD ($)
12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Mar. 27, 2023
Debt Instrument [Line Items]      
Maximum borrowing capacity     $ 70,000,000.0
Maturity date Mar. 27, 2028    
Unused credit commitment fee 0.20%    
Interest rate 6.90%    
Interest rate on term loan   4.20%  
Revolving Line Of Credit [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 62,500,000    
Line of credit $ 0 $ 0  
Term Loan [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity     $ 7,500,000
Frequency of periodic payment quarterly principal payments    
Quarterly principal payment amount $ 1,250,000    
Minimum [Member]      
Debt Instrument [Line Items]      
Fixed Charge Coverage Ratio 1.15    
Maximum [Member]      
Debt Instrument [Line Items]      
Leverage Ratio 3.00