Note F - Economic Dependency - Substantial Net Purchase From Certain Supplier (Details) - Supplier Concentration Risk [Member] - Raw Material Purchases [Member] - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	[1]
Raw Material Purchases by Supplier	$ 1,967
Supplier 1 [Member]
Raw Material Purchases by Supplier	$ 1,967

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