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Note 14 - Employee Benefit Plans - Summary of Fair Values of Pension Plan Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Fair value of plan assets $ 22,843 $ 30,051 $ 32,353
Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 11,339 14,910  
Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 11,504 15,141  
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 2,365 2,371  
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 1,671 2,008  
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 566 863  
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 209 169  
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 1,194 1,733  
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 210 405  
Real Estate [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 0 0  
Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 106 547  
Other Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets 0 0  
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of plan assets 5,018 6,814  
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of plan assets $ 11,504 $ 15,141