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Note 11 - Stock-Based Compensation (Details Textual) - USD ($)
12 Months Ended
Jun. 18, 2024
Dec. 31, 2025
Dec. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)   30,000 5,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   25,000  
Maximum [Member] | Restricted Stock [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   48 months  
Minimum [Member] | Restricted Stock [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   2 months  
The 2015 Omnibus Equity Incentive Plan [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 3,000,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)   1,700,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)   7,200,000  
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)   3,400,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   25,000 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Full Value Awards (in shares)   1,200,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Partial Value Awards (in shares)   1,000,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount   $ 1,700,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)   2 years 1 month 6 days  
The 2015 Omnibus Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   1 year  
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)   10 years  
The 2015 Omnibus Equity Incentive Plan [Member] | Maximum [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   4 years  
The 2005 Stok Option Plan [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)   0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   0  
Employee Stock Purchase Plan [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent   85.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Employee Contribution Limit, Percent   10.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Value, Shares Purchasable by Employees   $ 25,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee (in shares)   250  
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Purchasable (in shares)   281,250