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Note 14 - Equity Incentive Plan and Stock Based Compensation (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Feb. 25, 2020
May 31, 2021
May 31, 2020
May 31, 2021
May 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)   0   0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares)       0  
Share-based Payment Arrangement, Expense   $ 79,745 $ 115,172 $ 141,799 $ 152,752
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)   3,865 3,954 9,435 14,471
Share-based Payment Arrangement, Expense, Net of Shares Repurchased       $ 111,328 $ 126,216
Non-qualified Stock Units to Non-employee Directors Annually or Upon Election [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)   1,000   1,000  
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)       3 years 3 years
Restricted Stock [Member] | Employees and Directors [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       88,500 128,750
Restricted Stock [Member] | Director [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       15,000 15,000
The 2020 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) 500,000