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Notes Payable And Secured Credit Agreement (Narrative) (Details) - USD ($)
12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Nov. 30, 2019
Aug. 07, 2019
Aug. 06, 2019
Revolving Line Of Credit [Member] | 2019 Agreement [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity       $ 15,000,000.0  
Term Notes [Member]          
Debt Instrument [Line Items]          
Loan amount         $ 20,000,000.0
Percentage added to LIBOR rate 1.85%        
Term Notes [Member] | 2019 Agreement [Member]          
Debt Instrument [Line Items]          
Loan amount     $ 5,000,000.0    
Interest rate 4.20% 2.40%      
Term Notes [Member] | Maximum [Member] | 2019 Agreement [Member]          
Debt Instrument [Line Items]          
Loan amount       $ 25,000,000.0  
Term Notes [Member] | January, April, July, And October [Member]          
Debt Instrument [Line Items]          
Principal payment $ 1,250,000        
2019 Agreement [Member] | First Modification Agreement [Member]          
Debt Instrument [Line Items]          
Percentage added to LIBOR rate 3.00%        
2019 Agreement [Member] | Revolving Line Of Credit [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 15,000,000.0        
Maturity date Aug. 07, 2024        
Percentage added to LIBOR rate 1.85%        
Unused credit commitment fee 0.20%        
Line of credit $ 0 $ 0      
2019 Agreement [Member] | Standby Letters of Credit [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 10,000        
Strive [Member]          
Debt Instrument [Line Items]          
Interest rate 3.60%        
Strive [Member] | Strive Note [Member]          
Debt Instrument [Line Items]          
Principal payment $ 800,000        
Strive [Member] | Strive Note [Member] | Second Modification Agreement [Member]          
Debt Instrument [Line Items]          
Percentage added to LIBOR rate 1.85%        
Unused credit commitment fee 0.20%        
Maximum asset coverage ratio 150.00%        
Limit on capital expenditures $ 8,000,000.0        
Strive [Member] | Strive Note [Member] | Minimum [Member] | Second Modification Agreement [Member]          
Debt Instrument [Line Items]          
Fixed charge coverage ratio 1.15%        
Strive [Member] | Strive Note [Member] | Maximum [Member] | Second Modification Agreement [Member]          
Debt Instrument [Line Items]          
Maximum funded debt to EBITDAR ratio 3.00