Note F - Economic Dependency - Substantial Net Sales to Certain Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Net sales	$ 28,074	$ 34,067
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
Net sales	16,318	17,090
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Customer 1 [Member]
Net sales	13,157	17,090
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Customer 2 [Member]
Net sales	$ 3,161		[1]

[1] Sales were less than 10% of the respective period's total private label contract manufacturing net sales.