Annual report [Section 13 and 15(d), not S-K Item 405]

Note 13 - Stock-based Compensation (Details Textual)

v3.25.1
Note 13 - Stock-based Compensation (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Apr. 11, 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, Equity Instruments Other than Options, Grants in Period (in shares) 28,890    
Share-Based Payment Arrangement, Option [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 0 0  
Share-Based Payment Arrangement, Expense $ 0 $ 10,850  
Warrant [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares) 0 0  
Restricted Stock Units (RSUs) [Member]      
Share-Based Payment Arrangement, Expense $ 175,000 $ 300,000  
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 20,000    
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Nonemployee [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 20,653 3,049  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Grant Date Fair Value, Granted $ 121,849 $ 125,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 1 year 1 year  
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Employee [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 40,000 8,618  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Grant Date Fair Value, Granted $ 23,600 $ 193,000  
The 2013 Equity Incentive Plan [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)     75,000