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Note 1 - Summary of Accounting Policies - Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Foreign exchange contracts $ 255 $ 2,477
Foreign exchange contracts 1,222  
Interest rate swaps 3,096 6,667
Contingent consideration (a) [1] 3,333 1,343
Interest rate swaps   0
Fair Value, Inputs, Level 1 [Member]    
Foreign exchange contracts 0 0
Foreign exchange contracts 0  
Interest rate swaps 0 0
Contingent consideration (a) [1] 0 0
Interest rate swaps   0
Fair Value, Inputs, Level 2 [Member]    
Foreign exchange contracts 255 2,477
Foreign exchange contracts 1,222  
Interest rate swaps 3,096 6,667
Contingent consideration (a) [1] 0 0
Interest rate swaps   0
Fair Value, Inputs, Level 3 [Member]    
Foreign exchange contracts 0 0
Foreign exchange contracts 0  
Interest rate swaps 0 0
Contingent consideration (a) [1] 3,333 1,343
Interest rate swaps   0
Deferred Compensation Plan [Member]    
Marketable securities - deferred compensation plan 2,988 2,065
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 1 [Member]    
Marketable securities - deferred compensation plan 2,988 2,065
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.