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Note 12 - Stock-based Compensation (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Share-based Compensation, Tax Charges to Additional Paid in Capital From Exercise and Vesting $ 0   $ 0 $ 0 $ 0  
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount $ 0     $ 0   $ 0
Restricted Stock [Member]            
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) 65,411   3,007 74,414 209,636  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount $ 3,400   $ 100 $ 3,800 $ 6,500  
Share-Based Payment Arrangement, Expense 900   1,000 1,800 1,900  
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 8,500     $ 8,500    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       3 years 2 months 12 days    
Restricted Stock [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)       12 months    
Restricted Stock [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)       60 months    
Share-Based Payment Arrangement, Option [Member]            
Share-Based Payment Arrangement, Expense     $ 100 $ 0 $ 100  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   10 years        
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) 0     0    
Employee Stock Purchase Plan [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)   500,000        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 40,197     40,197    
The Fourth Amended 2014 Plan [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)   5,750,000        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 1,906,039     1,906,039