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			6 Months Ended
		Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2017		Dec. 31, 2016
Raw Material Purchases by Supplier		$ 3,402			$ 5,903	[1]
Supplier 1 [Member]
Raw Material Purchases by Supplier	[1]				2,992
Supplier 2 [Member]
Raw Material Purchases by Supplier		1,684		[1]	2,911			[1]
Supplier 3 [Member]
Raw Material Purchases by Supplier		$ 1,718		[1]		[1]		[1]

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