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Note 8 - Stock Based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2019
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)   13,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)   0   0  
Share Price (in dollars per share)   $ 9.62      
Restricted Stock [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)   83,000      
The 2019 Plan [Member] | Share-Based Payment Arrangement, Option [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)         1,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Pursuant to Exercise of Incentive Stock Options (in shares)         1,000,000
The 2019 Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Employee or Consultant [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)         250,000
The 2019 Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Non-employee Director [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)         50,000
The 2019 Plan [Member] | Restricted Stock [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)   1,585 2,649    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount   $ 249      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)   2 years 10 months 24 days      
The 2019 Plan [Member] | Restricted Stock [Member] | Board of Directors [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)   29,520      
Stock Issued During Period, Value, Issued for Services   $ 312      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)   27,935      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month)   3 months      
The 2019 Plan [Member] | Restricted Stock [Member] | Chief Executive Officer [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)     55,894    
Stock Issued During Period, Value, Issued for Services     $ 688    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)     53,245    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month)     3 months    
The 2019 Plan [Member] | Restricted Stock [Member] | Key Employee [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)     7,500    
Stock Issued During Period, Value, Issued for Services     $ 101    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month)     4 years    
Share Purchase Match Program [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Matching Percentage of Common Stock Purchased 20.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Matching of Common Stock Purchased per Individual Within a Calendar Year $ 25        
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)   1,585 9,956    
Shares Granted, Value, Share-Based Payment Arrangement, before Forfeiture   $ 18 $ 144    
Share Purchase Match Program [Member] | Restricted Stock [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)   2,000      
Stock Issued During Period, Value, Issued for Services   $ 24      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month)   3 months      
Share Purchase Match Program [Member] | Restricted Stock [Member] | Board of Directors [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)     5,270    
Stock Issued During Period, Value, Issued for Services     $ 80    
Share Purchase Match Program [Member] | Restricted Stock [Member] | Key Employee [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)     2,037    
Stock Issued During Period, Value, Issued for Services     $ 29