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, 2019		Sep. 30, 2018
Raw Material Purchases by Supplier			[1]	$ 3,107
Supplier 1 [Member]
Raw Material Purchases by Supplier			[1]	3,107
Supplier 2 [Member]
Raw Material Purchases by Supplier	[1]

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