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Note 5 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Total financial assets $ 4,280 $ 5,177
Fair Value, Inputs, Level 1 [Member]    
Total financial assets 3,082 3,090
Fair Value, Inputs, Level 2 [Member]    
Total financial assets 1,198 2,087
Fair Value, Inputs, Level 3 [Member]    
Total financial assets 0 0
Deferred Compensation Plan [Member]    
Deferred compensation plan 3,605 3,587
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 1 [Member]    
Deferred compensation plan 3,082 3,090
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 2 [Member]    
Deferred compensation plan 523 497
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 3 [Member]    
Deferred compensation plan 0 0
Foreign Exchange Forward [Member]    
Derivative assets 18 728
Foreign currency forward contracts (1) (80)
Foreign Exchange Forward [Member] | Fair Value, Inputs, Level 1 [Member]    
Derivative assets 0 0
Foreign currency forward contracts 0 0
Foreign Exchange Forward [Member] | Fair Value, Inputs, Level 2 [Member]    
Derivative assets 18 728
Foreign currency forward contracts (1) (80)
Foreign Exchange Forward [Member] | Fair Value, Inputs, Level 3 [Member]    
Derivative assets 0 0
Foreign currency forward contracts 0 0
Interest Rate Swap [Member]    
Derivative assets 657 862
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]    
Derivative assets 0 0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]    
Derivative assets 657 862
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]    
Derivative assets $ 0 $ 0