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Note 11 - Share-based Compensation (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 05, 2024
Jul. 31, 2024
Sep. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Jul. 01, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)           0      
Share-Based Payment Arrangement, Expense     $ 2,094,000   $ 700,000 $ 4,676,000 $ 2,472,000    
The 2017 Equity and Incentive Award Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 400,000 400,000             400,000
Annual Board Service [Member] | Year 2023 [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)               250,000  
Annual Board Service [Member] | Year 2024 [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)     312,500            
Board Committee Service [Member] | Year 2023 [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, Options, Grants in Period, Net of Forfeitures (in shares)               78,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)               10 years  
Share Price (in dollars per share)               $ 12.11  
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)               $ 3.88  
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year)               5 years 3 months  
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate               28.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate               4.16%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)           215,334      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)     0     0      
Board Committee Service [Member] | Year 2024 [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, Options, Grants in Period, Net of Forfeitures (in shares)     87,000            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)           10 years      
Share Price (in dollars per share)     $ 22.25     $ 22.25      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)           $ 8.87      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year)           5 years 3 months      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate           32.10%      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate           4.40%      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)           206,750      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)     192,750     192,750      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount     $ 1,700,000     $ 1,700,000      
Chief Executive Officer [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)       400,000          
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)           10 years      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)           $ 15.75      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year)           6 years      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate           31.00%      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate           3.82%      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)     400,000     400,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)     $ 6.02     $ 6.02      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount     $ 1.8     $ 1.8      
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche One [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)           133,334      
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)           133,333      
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Three [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)           133,333      
Chief Executive Officer [Member] | Year 2023 [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)               400,000  
Continued Service of the Chairman of the Board [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)               10 years  
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)               $ 9.08  
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year)               6 years 1 month 13 days  
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate               37.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate               3.49%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)     266,666     266,666      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)               $ 3.94  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount     $ 800,000     $ 800,000      
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche One [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)               133,334  
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)               133,333  
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche Three [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)               133,333  
Chair Sellers [Member] | The 2023 Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   63,500              
Director Case [Member] | The 2023 Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) 6,659                
Director Case [Member] | The 2024 Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) 3,124                
Restricted Stock [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)           3 years      
Share-Based Payment Arrangement, Expense     900,000   100,000 $ 1,600,000 700,000    
Restricted Stock [Member] | The 2017 Equity and Incentive Award Plan [Member]                  
Deferred Compensation Arrangement with Individual, Cancellation Expense     631,000            
Restricted Stock [Member] | Chair Sellers [Member] | The 2023 Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)   18,804              
Restricted Stock [Member] | CEO Randle [Member] | The 2017 Equity and Incentive Award Plan [Member]                  
Deferred Compensation Arrangement with Individual, Cancellation Expense     229,000            
Restricted Stock [Member] | CEO Randle [Member] | The 2024 Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) 28,511                
Restricted Stock [Member] | Director Case [Member] | The 2017 Equity and Incentive Award Plan [Member]                  
Deferred Compensation Arrangement with Individual, Cancellation Expense     402,000            
Restricted Stock [Member] | Director Case [Member] | The 2023 Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures (in shares) 56,000                
Restricted Stock [Member] | Director Case [Member] | The 2024 Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures (in shares) 56,000                
Share-Based Payment Arrangement, Option [Member]                  
Share-Based Payment Arrangement, Expense     $ 1,200,000   $ 600,000 $ 3,100,000 $ 1,400,000