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Note 11 - Capital Stock and Stock Compensation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Mar. 01, 2017
Nov. 27, 2021
Nov. 28, 2020
Nov. 30, 2019
Mar. 10, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)   0 0 0  
Payment, Tax Withholding, Share-based Payment Arrangement   $ 219 $ 228 $ (0)  
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount   (115) $ (114) $ 22  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total   $ 58      
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)   22,547 50,217 23,460  
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)   31,000      
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount   $ (133) $ (114) $ 0  
Restricted Stock [Member] | Employees [Member]          
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)     14,010    
Payment, Tax Withholding, Share-based Payment Arrangement     $ 228    
Plan 2021 [Member]          
Common Stock, Capital Shares Reserved for Future Issuance (in shares)         500,000
Plan 2010 [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)   31,000      
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)   10,850      
Payment, Tax Withholding, Share-based Payment Arrangement   $ 219      
Employee Stock Purchase Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent 85.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)   132,534