Note C - Property and Equipment (Details) - Property and Equipment (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, amount	$ 44,305	$ 43,264
Less: accumulated depreciation and amortization	(35,494)	(34,059)
Property and equipment, net	8,811	9,205
Land [Member]
Property, Plant and Equipment [Line Items]
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	26,772	26,141
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	3,189	3,030
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, depreciable life in years	3 years
Property and equipment, amount	209	136
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	$ 10,949	$ 10,771