Note J - Economic Dependency - Substantial Net Purchase From Certain Supplier (Details) - Supplier Concentration Risk [Member] - Raw Material Purchases [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018		Jun. 30, 2017
Raw Material Purchases by Supplier	$ 15,214		$ 6,694
% of Total Raw Material Purchases	21.00%		12.00%
Supplier 1 [Member]
Raw Material Purchases by Supplier	$ 7,727			[1]
% of Total Raw Material Purchases	11.00%			[1]
Supplier 2 [Member]
Raw Material Purchases by Supplier	$ 7,487			[1]
% of Total Raw Material Purchases	10.00%			[1]
Supplier 3 [Member]
Raw Material Purchases by Supplier		[1]	$ 6,694
% of Total Raw Material Purchases		[1]	12.00%

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