v3.25.4
Note 8 - Share-based Compensation Plans (Details Textual) - The 2020 Equity Incentive Plan [Member] - USD ($)
12 Months Ended
Mar. 03, 2020
Dec. 27, 2025
Dec. 28, 2024
Dec. 26, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized       1,500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant   415,620    
Share-Based Payment Arrangement, Expense   $ 273,028 $ 310,094  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total   $ 468,773    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition   1 year 10 months 13 days    
Share-Based Payment Arrangement, Option [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period 10 years      
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 5 years