Note 4 - Property, Plant and Equipment (Details) - Major classes of property, plant and equipment (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Major classes of property, plant and equipment [Abstract]
Land	$ 123	$ 123
Buildings and leasehold improvements	7,402	7,381
Machinery and equipment	46,552	46,606
Furniture and fixtures	1,928	1,810
Computer hardware and software	4,198	4,103
Construction in progress	1,138	1,275
	61,341	61,298
Less: Accumulated depreciation	50,092	48,883
	$ 11,249	$ 12,415