Note H - Segment Information (Details) - Net Sales by Geographic Region (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Note H - Segment Information (Details) - Net Sales by Geographic Region [Line Items]
Net sales	$ 19,127,000	$ 15,835,000	$ 52,757,000	$ 45,981,000
United States [Member]
Note H - Segment Information (Details) - Net Sales by Geographic Region [Line Items]
Net sales	8,992,000	9,485,000	26,695,000	27,288,000
Markets Outside the United States [Member]
Note H - Segment Information (Details) - Net Sales by Geographic Region [Line Items]
Net sales	$ 10,135,000	$ 6,350,000	$ 26,062,000	$ 18,693,000