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Note 5 - Inventories (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Selling Expense $ 3.2 $ 2.5 $ 9.2 $ 11.1