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Note 13 - Retirement Plans (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Retirement Plan Expense $ 2,600 $ 2,500 $ 2,200
Defined Contribution Plan [Member]      
Company Matching Percentage on First Eight Percent of Employee Contributions 50.00%    
Employee Contribution Percentage for Which Company Will Match at Fifty Percent 8.00%    
Pension Plan [Member]      
Number of Non-contributory Defined Benefit Plans 2    
Assets for Plan Benefits, Defined Benefit Plan $ 900 500  
Accumulated Other Comprehensive Income (Loss), Unrecognized Net Actuarial Losses, Net of Tax 900 1,200  
Defined Benefit Plan, Accumulated Benefit Obligation 4,300 4,600  
Defined Benefit Plan, Plan Assets, Amount 5,200 5,100  
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) $ 0 $ 0 $ 100
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.33% 4.69%  
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 7.00% 7.00%  
Non-qualified Retirement Savings Plan [Member] | Other Long-term Liabilities [Member]      
Deferred Compensation Liability, Classified, Noncurrent $ 3,800 $ 3,900