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Note 15 - Equity-based Compensation (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2017
Oct. 31, 2007
Dec. 31, 2023
Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)       0  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 200,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       1 year 6 months 10 days  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)       42,000  
Share-Based Payment Arrangement, Expense       $ 291,000 $ 220,000
Share-Based Payment Arrangement, Nonemployee [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)       36,000 0
Employees and Directors [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)       6,150 18,607
Share-Based Payment Arrangement, Expense       $ 300,000 $ 200,000
Restricted Stock [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)       0  
Share-Based Payment Arrangement, Expense       $ 40  
Restricted Stock [Member] | Employees and Directors [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       5,148  
The 2007 Omnibus Incentive Plan [Member] | Maximum [Member] | Incentive Stock Options (ISOs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)     10 years    
The 2017 Omnibus Incentive Plan [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)   66,243      
Share-based Compensation Arrangement by Share-based Payment Award, Annual Increase in Shares Authorized, Percentage of Outstanding Common Stock   4.00%   171424.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 81,417        
The 2017 Omnibus Incentive Plan [Member] | Incentive Stock Options (ISOs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percentage of Stock Owned by Shareholder, Minimum   10.00%      
The 2017 Omnibus Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)   4 years      
The 2017 Omnibus Incentive Plan [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   10 years      
The 2017 Omnibus Incentive Plan [Member] | Maximum [Member] | Incentive Stock Options (ISOs) [Member] | Shareholder of More Than 10% [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   5 years      
The 2017 Omnibus Incentive Plan [Member] | Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent   100.00%      
The 2017 Omnibus Incentive Plan [Member] | Minimum [Member] | Incentive Stock Options (ISOs) [Member] | Shareholder of More Than 10% [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent   110.00%