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Note 2 - Acquisitions - Components of Acquisition Related Costs (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Acquisition related expenses $ 688 $ 1,005
Deferred Compensation Arrangements [Member]    
Acquisition related expenses 667 703
Acquisition-related Costs [Member]    
Acquisition related expenses $ 21 $ 302