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
		Sep. 30, 2020	Sep. 30, 2019
Raw Material Purchases by Supplier		$ 3,375
% of Total Raw Material Purchases	[1]
Supplier 1 [Member]
Raw Material Purchases by Supplier		$ 3,375
% of Total Raw Material Purchases	[1]

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