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Note 14 - Employee Benefit Plans (Details Textual) - USD ($)
12 Months Ended 36 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Defined Benefit Plan Maximum Period Allocated for Calculating Average Compensation     10 years
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year $ 16,000   $ 16,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax, Total 9,951,000    
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax, Total $ 560,000 $ 613,000  
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 3.00%    
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total $ (1,948,000) (2,705,000) (1,948,000)
Other Liabilities [Member]      
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total $ 1,755,000 1,473,000 $ 1,755,000
Louisville Hourly Plan [Member]      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 2.35%    
Marion Plan [Member]      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 3.40%    
Louisville Salaried Plan [Member]      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 2.65%    
Defined Contribution Plan [Member]      
Defined Contribution Plan, Cost $ 404,000 361,000  
Non US Employees Defined Benefit Plan [Member]      
Defined Benefit Plan, Plan Assets, Administration Expense $ 253,000 $ 232,000  
Minimum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 2.35% 1.80%  
Minimum [Member] | Defined Benefit Plan, Equity Securities [Member]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 0.00%   0.00%
Minimum [Member] | Fixed Income Securities [Member]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 35.00%   35.00%
Minimum [Member] | Non Traditional Securities [Member]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 0.00%   0.00%
Maximum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 3.40% 2.95%  
Maximum [Member] | Defined Benefit Plan, Equity Securities [Member]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 55.00%   55.00%
Maximum [Member] | Fixed Income Securities [Member]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 100.00%   100.00%
Maximum [Member] | Non Traditional Securities [Member]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 10.00%   10.00%