Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Share-based Compensation and Employee Benefits Plans (Details Textual)

v3.20.4
Note 11 - Share-based Compensation and Employee Benefits Plans (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 17, 2020
Sep. 20, 2018
Dec. 26, 2020
Dec. 28, 2019
Dec. 26, 2020
Dec. 28, 2019
Sep. 26, 2020
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)         2 years 54 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares (in shares)     12,675 13,240 52,662 47,700  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value     $ 53,400 $ 61,000 $ 222,000 $ 185,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)     0 0 0 0  
Share-based Payment Arrangement, Option [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)         0    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total     $ 307,000   $ 307,000    
Share-based Payment Arrangement, Expense     $ 55,000 $ 56,000 $ 182,000 $ 159,000  
Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     0   0 10,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total     $ 8,000   $ 8,000    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)         91 days    
Share-based Payment Arrangement, Expense     $ 7,900 $ 9,600 $ 23,000 $ 70,000  
The 2018 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) 250,000            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 416,667           268,493
The 2018 Equity Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   10 years          
Equity Incentive Plan 2005 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)     0   0