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Note 20 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended 177 Months Ended
Apr. 13, 2009
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   0 0    
Directors Stock Option Plan [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 210,000        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month) 6 months        
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 10 years        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   0 0 0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value   $ 0     $ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value   $ 0 $ 0    
Employee's Long-term Incentive Plan [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 10 years        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)         0
Incentive Compensation Plan 2013 [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)   0 0    
Incentive Compensation Plan 2013 [Member] | Restricted Stock [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month)   1 year 1 year    
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants in Period, Grant Date Fair Value   $ 138 $ 157    
Share-Based Payment Arrangement, Expense   $ 138 $ 157    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)   9,000     9,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount   $ 52     $ 52
Incentive Compensation Plan 2013 [Member] | Restricted Stock [Member] | Director [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)   9,000 8,250    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)   $ 12.48 $ 19.05    
Incentive Compensation Plan 2013 [Member] | Restricted Stock [Member] | Chief Executive Officer [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     3,868    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)     $ 15.51