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Note 14 - Employee Benefit Plans - Summary of Fair Values of Pension Plan Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair value of plan assets $ 21,808 $ 22,843 $ 30,051
Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 10,628 11,339  
Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 11,180 11,504  
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 2,222 2,365  
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 0 0  
Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 2,354 1,671  
Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 0 0  
Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 301 566  
Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 0 0  
Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 175 209  
Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 0 0  
Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 873 1,194  
Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 0 0  
Real Estate [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets   210  
Real Estate [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets   0  
Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets   106  
Other Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets   0  
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 4,703 5,018  
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets $ 11,180 $ 11,504