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Term Notes Payable And Line Of Credit (Narrative) (Details) - USD ($)
9 Months Ended
May 31, 2020
Nov. 30, 2019
Aug. 31, 2019
Debt Instrument [Line Items]      
Line of credit $ 14,870,000    
Revolving Line Of Credit [Member]      
Debt Instrument [Line Items]      
Payable date Aug. 01, 2024    
Term Loan [Member] | Credit 2019 Agreement [Member]      
Debt Instrument [Line Items]      
Loan amount   $ 5,000,000 $ 20,000,000
Term Loan [Member] | Credit 2019 Agreement [Member] | Extended Maturity [Member]      
Debt Instrument [Line Items]      
Maturity date Aug. 31, 2024    
Maturity term 1 year    
Term Loan [Member] | Maximum [Member] | Credit 2019 Agreement [Member]      
Debt Instrument [Line Items]      
Loan amount $ 25,000,000