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Note 7 - Corporate Debt (Details Textual)
12 Months Ended
Aug. 31, 2021
USD ($)
Aug. 31, 2021
USD ($)
Aug. 30, 2021
USD ($)
Aug. 31, 2020
USD ($)
PNC Bank [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility, Maximum Borrowing Capacity $ 5,000,000 $ 5,000,000 $ 3,000,000  
Long-term Line of Credit, Total $ 0 $ 0   $ 0
Debt Instrument, Covenants, Fixed Charge Coverage Ratio   1.10    
Letters of Credit Outstanding, Amount       $ 0
PNC Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument, Basis Spread on Variable Rate 2.50%      
JP Morgan Chase Bank [Member]        
Letters of Credit Outstanding, Amount $ 104,363 $ 104,363