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Note 10 - Loan and Credit Agreements (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 12, 2021
USD ($)
Jan. 11, 2021
USD ($)
Jun. 24, 2020
USD ($)
Jun. 18, 2020
USD ($)
Feb. 13, 2019
USD ($)
Sep. 28, 2017
USD ($)
Aug. 31, 2021
USD ($)
May 31, 2021
USD ($)
Nov. 30, 2020
USD ($)
Feb. 28, 2021
USD ($)
Long-term Debt, Total               $ 2,771,546 $ 2,808,129  
Term Loan Due October 2037 [Member]                    
Long-term Debt, Total               $ 2,305,595 $ 2,350,593  
Debt Instrument, Interest Rate, Stated Percentage               5.00% 5.00%  
Debt Instrument, Periodic Payment, Total               $ 17,271 $ 17,271  
EIDL Assistance Program [Member] | Forecast [Member]                    
Proceeds from Issuance of Debt             $ 1,050,000      
EIDL Assistance Program, Loan One [Member]                    
Proceeds from Issuance of Debt       $ 150,000            
EIDL Assistance Program, Loan Three [Member]                    
Proceeds from Issuance of Debt     $ 150,000              
Economic Injury Distaster Loan Assistance Program [Member]                    
Debt Instrument, Interest Rate, Stated Percentage     3.75%              
Debt Instrument, Term (Year)     30 years              
EIDL Assistance Program, Loan Two [Member]                    
Debt Instrument, Periodic Payment, Total     $ 731              
Proceeds from Issuance of Debt       $ 150,000            
Bank Midwest [Member]                    
Long-term Line of Credit, Total               4,088,530    
Line of Credit Facility, Remaining Borrowing Capacity               $ 911,470    
Line of Credit, Borrowing Base, Accounts Receivable               75.00%    
Line of Credit, Borrowing Base, Inventory               50.00%    
Debt Instrument, Covenant, Maximum Debt to Worth Ratio           1        
Debt Instrument, Covenant, Minimum Tangible Balance Sheet Equity, Percentage           40.00%        
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio           1.25        
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio, Tolerance           0.1        
Debt Instrument, Covenant, Annual Purchases or Sales Price of Equipment Before Requiring Bank Approval           $ 100,000        
Debt Instrument, Covenant, Minimum Working Capital Ratio   1.75                
Debt Instrument, Covenant, Minimum Working Capital   $ 5,100,000                
Bank Midwest [Member] | Term Loan Due October 2037 [Member]                    
Long-term Debt, Total               $ 2,600,000    
Debt Instrument, Periodic Payment, Total                 17,271  
Bank Midwest [Member] | Term Loan Due October 2037 [Member] | United States Department of Agriculture [Member]                    
Upfront Guarantee Fee                 $ 62,400  
Guarantee Fee, Annual Fee, Percentage                 0.50%  
Guarantee Requirement, Personally Guarantee, Shareholders Ownership Percentage                 20.00%  
Bank Midwest [Member] | Term Loan Due October 2037 [Member] | J. Ward McConnell Jr. [Member]                    
Personally Guaranteed, Percentage of Loan                 38.00%  
Personally Guaranteed, Fee, Percentage of Guaranteed Amount                 2.00%  
Bank Midwest [Member] | Revolving Credit Facility [Member]                    
Line of Credit Facility, Maximum Borrowing Capacity               $ 5,000,000    
Debt Instrument, Basis Spread on Variable Rate         1.00%          
Line of Credit Facility, Interest Rate During Period               4.75%    
Debt Instrument, Interest Rate, Effective Percentage         4.25%          
Bank Midwest [Member] | Revolving Credit Facility [Member] | Wall Street Journal Rate [Member]                    
Long-term Line of Credit, Total         $ 4,000,000          
Debt Instrument, Basis Spread on Variable Rate               1.00%    
Line of Credit Facility, Interest Rate During Period               4.75%    
Bank Midwest [Member] | Term Loan Due October 2037 [Member]                    
Debt Instrument, Interest Rate, Stated Percentage                 5.00%  
Bank Midwest [Member] | Term Loan Due October 2037 [Member] | Minimum [Member]                    
Debt Instrument, Interest Rate, Effective Percentage                 4.15%  
Bank Midwest [Member] | Term Loan Due October 2037 [Member] | Wall Street Journal Rate [Member]                    
Debt Instrument, Basis Spread on Variable Rate                 0.75%  
Bank Midwest, New Amended Covenant [Member]                    
Debt Instrument, Covenant, Minimum Working Capital Ratio 1.75                  
Debt Instrument, Covenant, Minimum Working Capital $ 4,000,000                  
Debt Instrument, Working Capital Covenant, Out of Compliance, Amount               $ 126,496   $ 240,885