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			9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016		Mar. 31, 2017		Mar. 31, 2016
Raw Material Purchases by Supplier	$ 4,646		[1]		[1]		[1]
% of Total Raw Material Purchases	45.00%
Supplier 1 [Member]
Raw Material Purchases by Supplier	$ 1,683		[1]		[1]		[1]
% of Total Raw Material Purchases	16.00%		[1]		[1]		[1]
Supplier 2 [Member]
Raw Material Purchases by Supplier	$ 1,646		[1]		[1]		[1]
% of Total Raw Material Purchases	16.00%		[1]
Supplier 3 [Member]
Raw Material Purchases by Supplier	$ 1,317		[1]		[1]		[1]
% of Total Raw Material Purchases	13.00%

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