Note J - Economic Dependency - Substantial Net Purchase From Certain Suppliers (Details) - Supplier Concentration Risk [Member] - Raw Material Purchases [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019		Jun. 30, 2018
Raw Material Purchases by Supplier	$ 8,240		$ 15,214
% of Total Raw Material Purchases	11.00%		21.00%
Supplier 1 [Member]
Raw Material Purchases by Supplier	$ 8,240		$ 7,487
% of Total Raw Material Purchases	11.00%		10.00%
Supplier 2 [Member]
Raw Material Purchases by Supplier		[1]	$ 7,727
% of Total Raw Material Purchases		[1]	11.00%

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