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Note 2 - Acquisitions - Components of Acquisition Related Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Acquisition related costs $ 859 $ 703 $ 1,547 $ 1,708
Deferred Compensation Arrangements [Member]        
Acquisition related costs 703 703 1,370 1,405
Acquisition-related Costs [Member]        
Acquisition related costs $ 156 $ 177 $ 303