Note 3 - Supplemental Balance Sheet Information (Details) - Major Classes of Property, Plant, and Equipment (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Major Classes of Property, Plant, and Equipment [Abstract]
Land	$ 123	$ 123
Buildings and Leasehold Improvements	7,412	7,381
Machinery and Equipment	47,405	46,606
Furniture and Fixtures	1,866	1,810
Computer Hardware and Software	4,247	4,103
Construction in Progress	1,073	1,275
	62,126	61,298
Less: Accumulated Depreciation	51,924	48,883
	$ 10,202	$ 12,415

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.

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