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Note 1 - Summary of Accounting Policies - Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Foreign exchange contracts $ 0 $ 122
Interest rate swaps 10,235 8,420
Debt securities 2,729  
Equity securities 2,046  
Foreign exchange contracts 1,722 711
Interest rate swaps 0 0
Business Combination, Contingent Consideration, Liability, Total [1]   1,167
Fair Value, Inputs, Level 1 [Member]    
Foreign exchange contracts 0 0
Interest rate swaps 0 0
Debt securities 0  
Equity securities 0  
Foreign exchange contracts 0 0
Interest rate swaps 0 0
Business Combination, Contingent Consideration, Liability, Total [1]   1,167
Fair Value, Inputs, Level 2 [Member]    
Foreign exchange contracts 0 122
Interest rate swaps 10,235 8,420
Debt securities 0  
Equity securities 0  
Foreign exchange contracts 1,722 711
Interest rate swaps 0 0
Business Combination, Contingent Consideration, Liability, Total [1]   0
Fair Value, Inputs, Level 3 [Member]    
Foreign exchange contracts 0 0
Interest rate swaps 0 0
Debt securities 2,729  
Equity securities 2,046  
Foreign exchange contracts 0 0
Interest rate swaps 0 0
Business Combination, Contingent Consideration, Liability, Total [1]   0
Deferred Compensation Plan [Member]    
Marketable securities - deferred compensation plan 3,720 3,033
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 1 [Member]    
Marketable securities - deferred compensation plan 3,720 3,033
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 2 [Member]    
Marketable securities - deferred compensation plan 0 0
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 3 [Member]    
Marketable securities - deferred compensation plan $ 0 $ 0
[1] The fair value of our contingent consideration arrangement is determined based on our evaluation as to the probability and amount of any deferred compensation that has been earned to date.