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Debt (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Nov. 30, 2020
May 31, 2019
Aug. 31, 2020
Line of Credit Facility, Current Borrowing Capacity   $ 15,000,000    
Line of Credit Facility, Remaining Borrowing Capacity   $ 10,000,000    
Line of Credit Facility, Expiration Date   Jul. 05, 2021    
Line of Credit Facility, Interest Rate Description   The amounts outstanding under this line of credit as of November 30, 2020 and August 31, 2020 are currently all under the default variable interest index rate of 3.5%.    
Long-term Line of Credit   $ 2,939,000   $ 5,100,000
Debt Instrument, Maturity Date May 15, 2027      
Construction Loan   4,780,000   4,807,000
Proceeds from Sale of Property, Plant, and Equipment     $ 7,075,000  
Community Bank        
Long-term Line of Credit   100,000    
Letter of Credit        
Notes Payable, Noncurrent   100,000    
Financial Guarantee        
Proceeds from Issuance of Long-term Debt   5,000,000    
Construction Loan Payable        
Long-term Line of Credit $ 5,000,000      
Amount drawn and converted   $ 4,807,000   $ 4,807,000
Interest rate   4.35%   4.35%
Debt Instrument, Interest Rate, Stated Percentage   4.35%   4.35%
Minimum        
Line of Credit Facility, Maximum Borrowing Capacity   $ 10,000,000    
Debt Instrument, Basis Spread on Variable Rate   3.50%    
Maximum        
Line of Credit Facility, Maximum Borrowing Capacity   $ 15,000,000    
Prime Rate [Member]        
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate   4.60%   0.25%