Note K - 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, 2020		Jun. 30, 2019
Raw Material Purchases by Supplier	$ 6,356		$ 8,240
% of Total Raw Material Purchases	10.00%		11.00%
Supplier 1 [Member]
Raw Material Purchases by Supplier	$ 6,356			[1]
% of Total Raw Material Purchases	10.00%			[1]
Supplier 2 [Member]
Raw Material Purchases by Supplier		[1]	$ 8,240
% of Total Raw Material Purchases		[1]	11.00%

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