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Note 4 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Deferred compensation plan $ 3,610 $ 4,321
Total financial assets 3,950 4,338
Foreign currency forward contracts (714) (661)
Interest Rate Swap [Member]    
Derivative assets 310  
Foreign Exchange Forward [Member]    
Derivative assets 30 17
Fair Value, Inputs, Level 1 [Member]    
Deferred compensation plan 3,109 3,830
Total financial assets 3,109 3,830
Foreign currency forward contracts 0 0
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]    
Derivative assets 0  
Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Forward [Member]    
Derivative assets 0 0
Fair Value, Inputs, Level 2 [Member]    
Deferred compensation plan 501 491
Total financial assets 841 508
Foreign currency forward contracts (714) (661)
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]    
Derivative assets 310  
Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Forward [Member]    
Derivative assets 30 17
Fair Value, Inputs, Level 3 [Member]    
Deferred compensation plan 0 0
Total financial assets 0 0
Foreign currency forward contracts 0 0
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]    
Derivative assets 0  
Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Forward [Member]    
Derivative assets $ 0 $ 0