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Note 11 - Equity Plans (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
C-Suite Long-Term Incentive Plan [Member]        
Minimum Return on Assets for Performance-Based Incentives     5.00%  
Performance-Based Award Cap, Percentage of Grant     150.00%  
Chief Executive Officer [Member] | C-Suite Long-Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Amount Per Employee   $ 1,100,000    
Chief Financial Officer [Member] | C-Suite Long-Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Amount Per Employee   500,000    
President and Chief Operating Officer [Member] | C-Suite Long-Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Amount Per Employee   $ 800,000    
Restricted Stock [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 21,336 10,050    
Restricted Stock [Member] | Non-Employee Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Value $ 110,000 $ 110,000    
Restricted Stock [Member] | Non-Employee Director [Member] | Share-Based Payment Arrangement, Tranche One [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.33%      
Restricted Stock Units (RSUs) [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 40,000 34,486    
Restricted Stock Units (RSUs) [Member] | C-Suite Long-Term Incentive Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 20,000   17,243  
Restricted Stock Units (RSUs) [Member] | Non-Employee Director [Member] | Share-Based Payment Arrangement, Tranche One [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   1 year    
Performance Shares [Member] | C-Suite Long-Term Incentive Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 20,000   17,243  
Service Based Cash Awards [Member] | C-Suite Long-Term Incentive Plan [Member]        
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount $ 531,300   $ 37,400  
Performance-Based Cash Awards [Member] | C-Suite Long-Term Incentive Plan [Member]        
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount $ 531,300   $ 37,400  
Common Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)       1,400,000