Annual report pursuant to Section 13 and 15(d)

Note 10 - Equity Incentive Plan (Details Textual)

v3.24.1
Note 10 - Equity Incentive Plan (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 1,868,240  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year  
Restricted Stock Units (RSUs) [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 87,750 117,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) 99,886 33,334
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period 27,869 12,451
Performance Stock Units (PSUs) [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 0 114,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) (0) (0)
Share-Based Payment Arrangement, Option [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period 10 years  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 3 years  
Share-Based Payment Arrangement, Option [Member] | Director [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 1 year  
Equity Incentive Plan [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant 504,549  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross 12,000 61,062
Equity Incentive Plan [Member] | Board Member [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross   31,062
Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Executive Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period   57,500
Equity Incentive 2013 Plan [Member]    
Share Based Compensation Arrangement By Share Based Payment Award, Grants In Period, Fair Value $ 915,789 $ 2,688,111
Share-Based Payment Arrangement, Expense 363,563 $ 320,722
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value $ 1,100,000  
Equity Incentive 2013 Plan [Member] | Performance Stock Units (PSUs) [Member] | Executive Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period   97,500
Equity Incentive 2013 Plan [Member] | Share-Based Payment Arrangement, Employee [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross 12,000 30,000
Equity Incentive 2013 Plan [Member] | Share-Based Payment Arrangement, Employee [Member] | Restricted Stock Units (RSUs) [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 60,200 59,500
Equity Incentive 2013 Plan [Member] | Share-Based Payment Arrangement, Employee [Member] | Performance Stock Units (PSUs) [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period   16,500
Equity Incentive 2013 Plan [Member] | Share-Based Payment Arrangement, Nonemployee [Member] | Restricted Stock Units (RSUs) [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 27,550