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Note 13 - Share-based Compensation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 2,000,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 1,712,378    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   5 years  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value $ 500 $ 4,500  
Proceeds from Stock Options Exercised 728 2,703  
Share-based Payment Arrangement, Exercise of Option, Tax Benefit   900  
Share-Based Payment Arrangement, Option [Member]      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 1,400    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 10 months 24 days    
Stock Appreciation Rights (SARs) [Member]      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 100 800  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 7 months 6 days    
Employee Service Share-based Compensation, Tax Benefit from Exercise of Equity Instruments Other than Options     $ 100
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount   $ 200  
Restricted Stock [Member]      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 7 months 6 days    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 4,600    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)   3 years  
Restricted Stock [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)   5 years  
Performance Shares [Member]      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 3 years 7 months 6 days    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 2,400    
Performance Shares [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)   5 years  
Performance Shares [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)   3 years  
Common Stock [Member]      
Shares Received from Stock Options Exercised (in shares) 9,738 17,365  
Stock Issued During Period, Shares, New Issues (in shares) 11,784 24,591  
Outside Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   10 years