Note F - Economic Dependency - Substantial Net Sales to Certain Customers (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2016		Dec. 31, 2015
Revenue, Net	$ 30,559		$ 26,911	$ 64,626		$ 48,496
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]
Revenue, Net	15,074		15,206	32,152		25,030
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Customer 1 [Member]
Revenue, Net	15,074		11,902	32,152		18,691
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Customer 2 [Member]
Revenue, Net		[1]	$ 3,304		[1]	$ 6,339

[1] Sales were less than 10% of the respective period's total revenues.