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Note 7 - Stock Based Compensation (Details Textual) - USD ($)
12 Months Ended
Jan. 01, 2026
Dec. 17, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)     0 0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options Exercisable, Vested, Number of Shares (in shares)       84  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period (in shares)       250  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)         0
Share-Based Payment Arrangement, Expense     $ 62,000 $ 0  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount     $ 0 0  
Share-Based Payment Arrangement, Option [Member]          
Share-Based Payment Arrangement, Expense       $ 62,000  
The 2019 Plan [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)     2,000,000 0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)   2,000,000      
The 2019 Plan [Member] | Subsequent Event [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 2,166,360        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized, Percentage of Outstanding Stock 5.00%