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Note 9 - Derivative Financial Instruments - Details About Accumulated Other Comprehensive Income (Loss) Components (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Accumulated other comprehensive income (loss) component $ 2,363 $ 80 $ 3,427 $ 384
Cross Currency Interest Rate Contract [Member] | Interest Expense [Member]        
Accumulated other comprehensive income (loss) component 2,363 80 3,427 309
Foreign Exchange Contract [Member] | Cost of Sales [Member]        
Accumulated other comprehensive income (loss) component $ 75