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Note 12 - Equity Incentive Plan (Details Textual) - USD ($)
12 Months Ended
Feb. 25, 2020
Nov. 30, 2020
Nov. 30, 2019
Jan. 27, 2011
Share-based Payment Arrangement, Expense   $ 247,645 $ 195,416  
Share-based Payment Arrangement, Expense, Tax Benefit   $ 176,435 122,022  
Share-based Payment Arrangement, Amount Capitalized     $ 0  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)   0    
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)   16,255 9,556  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)   0 0  
Share-based Payment Arrangement, Expense, Net of Shares Repurchased   $ 216,649 $ 176,093  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares (in shares)   0 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance (in shares)   0 0  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total   $ 0    
Proceeds from Stock Options Exercised   $ 0 $ 0  
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  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)   74,685 32,600  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)   4,833 1,400  
Restricted Stock [Member] | Employees, Directors, and Consultants [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)   128,750 56,750  
Restricted Stock [Member] | Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)   25,000 31,687  
Restricted Stock [Member] | Employees [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     9,000  
The 2020 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) 500,000