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Note 10 - Derivative Financial Instruments (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Derivative, Notional Amount $ 175,000    
Derivative, Average Fixed Interest Rate 1.18%    
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing $ 0 $ 0 $ 0
Outstanding Forward Contracts, Net Unrealized Gain (Loss) $ 600 $ 1,000