Note C - Property and Equipment (Details) - Property and Equipment (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, amount	$ 44,574	$ 44,305
Less: accumulated depreciation and amortization	(35,921)	(35,494)
Property and equipment, net	8,653	8,811
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years
Property and equipment, amount	393	393
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	7 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	39 years
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, amount	2,793	2,793
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	12 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, amount	26,982	26,772
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	5 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, amount	3,201	3,189
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	3 years
Property and equipment, amount	209	209
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	1 year
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	15 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, amount	$ 10,996	$ 10,949