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Note 10 - Loan and Credit Agreements (Details Textual)
3 Months Ended 12 Months Ended
Jan. 12, 2021
USD ($)
Jun. 24, 2020
USD ($)
Jun. 18, 2020
USD ($)
Feb. 13, 2019
USD ($)
Sep. 28, 2017
USD ($)
Feb. 28, 2021
USD ($)
Nov. 30, 2020
USD ($)
Long-term Debt, Total           $ 2,790,417 $ 2,808,129
Term Loan Due October 2037 [Member]              
Long-term Debt, Total           $ 2,328,719 $ 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, Loan One [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        
EIDL Assistance Program, Loan Three [Member]              
Proceeds from Issuance of Debt   $ 150,000          
Bank Midwest [Member]              
Long-term Line of Credit, Total           1,875,530  
Line of Credit Facility, Remaining Borrowing Capacity           $ 3,124,470  
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    
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  
Long-term Line of Credit, Total           4,969,155  
Line of Credit Facility, Remaining Borrowing Capacity           $ 3,093,625  
Debt Instrument, Basis Spread on Variable Rate       1.00%      
Line of Credit Facility, Interest Rate During Period           4.25%  
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           4.25%  
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 $ 4,000,000            
Debt Instrument, Covenant, Minimum Working Capital Ratio 1.75