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Note 5 - Inventories (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Selling Expense $ 2.5 $ 3.0 $ 11.1 $ 8.4