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Note 12 - Capital Stock and Stock Compensation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Mar. 01, 2017
Nov. 26, 2022
Nov. 27, 2021
Nov. 28, 2020
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   $ 19 $ 219 $ 228  
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount   (115) $ (115) $ (114)  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total   $ 611      
Stock Issued During Period, Shares, Employee Stock Purchase Plans   30,074 22,547 50,217  
Restricted Stock [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period   10,605      
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount   $ 1 $ (133) $ (114)  
Restricted Stock [Member] | Employees [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period   3,500      
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation   1,225 10,850 14,010  
Payment, Tax Withholding, Share-Based Payment Arrangement     $ 219    
Restricted Stock [Member] | Director [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period   7,105      
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   10,605      
Payment, Tax Withholding, Share-Based Payment Arrangement   $ 19      
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   102,460