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Note 2 - Acquisitions - Components of Acquisition Related Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Acquisition related costs $ 805 $ 1,254 $ 2,352 $ 2,962
Deferred Compensation Arrangements [Member]        
Acquisition related costs 703 702 2,107 2,108
Acquisition-related Costs [Member]        
Acquisition related costs $ 102 $ 552 $ 245 $ 854