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Note 2 - Acquisitions - Components of Acquisition Related Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Acquisition related costs $ 1,254 $ 5,422 $ 2,962 $ 6,925
Deferred Compensation Arrangements [Member]        
Acquisition related costs 702 703 2,108 1,405
Acquisition-related Costs [Member]        
Acquisition related costs 589 4,719 891 5,520
Other [Member]        
Acquisition related costs $ (37) $ (37)