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Note 9 - Notes Payable (Details Textual) - USD ($)
3 Months Ended
May 31, 2021
Feb. 28, 2021
Nov. 30, 2020
May 31, 2020
Proceeds from Notes Payable, Total     $ 1,537,200
SBA Loans [Member]        
Forgiveness of Indebtedness   $ 1,400,000 $ 108,000  
Line of Credit [Member] | Wells Fargo Bank [Member]        
Proceeds from Notes Payable, Total     $ 1,500,000  
Long-term Line of Credit, Total 5,000,000      
Line of Credit Facility, Remaining Borrowing Capacity $ 5,000,000      
Line of Credit [Member] | Wells Fargo Bank [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument, Basis Spread on Variable Rate 2.25%      
Debt Instrument, Interest Rate, Stated Percentage 2.40%