Note G - Economic Dependency - Substantial Net Purchase From Certain Suppliers (Details) - Supplier Concentration Risk [Member] - Raw Material Purchases [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Raw Material Purchases by Supplier	$ 5,978	$ 1,930	$ 15,765
Supplier 1 [Member]
Raw Material Purchases by Supplier	$ 5,978	$ 1,930	$ 15,765		[1]

[1] Purchases were less than 10% of the respective period's total raw material purchases.