Note G - Economic Dependency - Substantial Net Sales to Certain Customers (Details) - USD ($)	3 Months Ended
	Sep. 30, 2015		Sep. 30, 2014
Sales Revenue, Goods, Net [Member] | Customer 1 [Member] | Customer Concentration Risk [Member]
Net sales	$ 6,789,000		$ 6,997,000
% of total net sales	42.00%		40.00%
Sales Revenue, Goods, Net [Member] | Customer 2 [Member] | Customer Concentration Risk [Member]
Net sales	$ 3,035,000			[1]
% of total net sales	19.00%			[1]
Sales Revenue, Goods, Net [Member] | Customer 3 [Member] | Customer Concentration Risk [Member]
Net sales	$ 1,730,000		$ 0	[1]
% of total net sales	11.00%			[1]
Sales Revenue, Goods, Net [Member] | Customer 4 [Member] | Customer Concentration Risk [Member]
Net sales		[1]	$ 2,209,000
% of total net sales		[1]	13.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]
Net sales	$ 11,554,000		$ 12,114,000
% of total net sales	72.00%		70.00%
Net sales	$ 21,585,000		$ 18,695,000

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