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Note 5 - Fair Value Measurements - Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Jun. 30, 2018
Interest rate swaps $ 1,509 $ 1,325
Foreign exchange contracts 4,070 1,357
Contingent acquisition payments (a) [1] 7,362 7,535
Foreign exchange contracts   4,204
Fair Value, Inputs, Level 1 [Member]    
Interest rate swaps
Foreign exchange contracts
Contingent acquisition payments (a) [1]
Foreign exchange contracts  
Fair Value, Inputs, Level 2 [Member]    
Interest rate swaps 1,509 1,325
Foreign exchange contracts 4,070 1,357
Contingent acquisition payments (a) [1]
Foreign exchange contracts   4,204
Fair Value, Inputs, Level 3 [Member]    
Interest rate swaps
Foreign exchange contracts
Contingent acquisition payments (a) [1] 7,362 7,535
Foreign exchange contracts  
Deferred Compensation Plan [Member]    
Marketable securities - deferred compensation plan 2,443 2,362
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 1 [Member]    
Marketable securities - deferred compensation plan 2,443 2,362
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 2 [Member]    
Marketable securities - deferred compensation plan
Deferred Compensation Plan [Member] | Fair Value, Inputs, Level 3 [Member]    
Marketable securities - deferred compensation plan
[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.